If your talking searching on E bay.
I just did a search for "1942 Jefferson", it came up with 440 hits.
that pretty much gives you every one for 1942, but I like to look that way
because some seller type or enter their auction wrong.
With that search I saw a few nice 1942's that were listed as T1, type 1, no P
and some just 1942.
Of course with that search you will get the 42 D's and S's also.
Good luck.