I thought about saying something humorous , but the truth is; if the members of this board knew of a store in KY full of well liked, but discontinued bourbons, we would go there, shop, have a party, then blog about it.
In the last few years I've had decent luck in some of the quieter Louisville neighborhoods. Not stores on Bardstown Road or that kind of thing much less Party Source and the big beverage outlets, but small grocery stores off the beaten track. Once I found a McCormick bourbon there, once some ND OT. One time, the owner said the week before he sold his last Louisville Yellowstone. It takes time and patience, but Louisville still has good potential also Indiana across the river possibly.