Best Source For 1992 Newer 90% Silver Kennedys

Ok, IV managed to complete a dansco with proofs kennedy album from rolls, Iv got it complete, except 10 coins iv purchased or need, and 99% are nice coins.

But the other coins iv never found are the 1992 and newer 90% kenedys, IV purchased 2 so far, the 1992 and 1998, I bought the silver mint set and cracked them. See the best deal I could find for the kennedy for those 2 years was 20$ each, I found the whole mint sets for 25-28$ I figured that was worth it Just getting the silver and quarter and dime.

The problem is those mint sets go up in price in 99, with all the extra State Quarters.

Is anyone cracking those sets open for the silver ATB Quarters, or State Quarters? Thought maybe I could find someone who wanted to trade the kennedy off for some 40% silvers, or maybe someone nows an online store thats reasonably priced for those 90% coins, Like 20$ or less.

I know some of the low mint years will run more.