Are There Any Newfie Coins Rated In PL ?

Yes and no.
For Canadian collectors PL is not a grade, rather it denotes a special type of strike and finish used by the RCM for certain coins struck specifically for collectors. None were struck before 1949, a couple of years after Newfoundland coinage was toast. The Canadian grading companies, ICCS and CCCS will not slab any Newfoundland coins as PL.
Americans have a different definition of PL. See the glossary on this forum for the US definition of prooflike. PCGS will grade Newfoundland coins as PL if they meet the US requirements of the definition. Don't know what other US TPG's do.

Many of the 1943 five and ten cents can be prooflike in appearance.

There are specimen strikes for NFLD coins, albeit quite rare.

The old Newfoundland records would say nothing as the coins were all made in either Birmingham, London , or Ottawa. Proof Like is a term that is thrown around loosely as a descriptive and is NOT official in any way. Used by coin collectors and TPG.
Almost all of the Ottawa issues from 1943 on were struck from chrome plated dies and a good deal of the 5 and ten cent silver pieces (especially fives) all exhibit what we would today consider "proof like" surfaces. This is especially note worthy when you examine pieces in MS63 or higher. Most of these even have Cameo to Heavy Cameo portraits.

Specimen is a method of striking rather than a grade. The early specimen coins of Canada and Provincial issues are rare and spectacular to behold (if unimpaired). The issues of Queen Victoria tend to have highly frosted devices and lettering and mirror fields. The coinage of the Edwardian and George V reigns are generally considered to be a MATTE dull finish rather highly detailed and grainy in appearance. George VI specimen coinage continued to have this Matte type appearance in 1937. At this time the familiar overall highly polished look came into fashion late 1937 through the 1940's. Specimen coins and sets were purpose made for dignitaries , museums ,and the odd collector. Some items such as the Specimen 1936 dot cent and ten cents were allegedly made to order many years later ,as they all ended up originally with the same person. True double struck Royal Canadian Mint PROOF coinage was first issued in 1981.
As to what the TPG does each one is different. The US firms all call some highly polished well struck circulation strike Morgan dollars Proof like, Deep Proof like, Deep mirror proof like etc. and use the term(s) as warranted. Meant more as a descriptive than anything else. They are highly prized and do command hefty premiums. The Canadian firms use Pl as defined in the Charlton catalogue.

yes I believe there is specimen coinage, but pl and proof and Sp are all different things. Remember the 1864 2 dollar nova scotia or Newfoundland that sold for like 110000. I may be wrong on my dates but...

As I said above the 1908 sets are Matte, somewhat grainy and highly detailed. Over the years we have handled a fair amount of these sets. They vary from mishandled Specimens ( cleaned ,played with) to Gem Specimen in appearance. Just depended on how they were stored or protected. Your comment about coming back MS 64/65 in body bags is not possible. They would have come back in body bags explaining what the problem was and would have been No Grades. When the 1908 sets and sovereigns come back from ICCS they are graded SP, not MS. Sounds to me like you had a problem set ( for whatever reason ) that they just would not grade.
Years ago when I had my coin shop I Had a gentleman come in with a 1908 set that he had polished with silver cleaner because the coins were in his words "dark and dirty". I passed !