A number of kits of "strip malls" are out there. Model Power 615 West End Shopping Center is easily available on eBay and in Hobby Shops with older stock still around. It has 4 stores which are absolutely tiny but you can decorate them anyway you want -- my version is the Sleazy West End Shopping Center with pawn shop, gun shop, xxx book store and pizza joint...Summit Engineering has a number of strip malls + individual stores and fast food stores. No local hobby shop use Walthers pr eBay stores. I find Amazon too high priced.
Probably others out there I am forgetting to mention.
have fun all, Swamp Daddy