Nothing really special as far as I know. You might want to check the Kentucky Reef Society forum.
It's always surprised me Lex didn't have at at least one really cool store though.
When you pass the Grayson exit you're only a mile, maybe two, away from Reef & Reptiles though. They evidently are rebuilding the salt side and didn't have much last month but the owners are really nice folks...so far I've only talked to Jarrod on the phone but I met him at Bert's years ago and his wife is a real sweetheart.