If you're in or anywhere near a city of any size (say 200,000 or more population) there is almost certainly a local wholesaler who deals in this stuff -- check the yellow pages, or even go into a small chain/mom & pop store and ask.
You might also check CityWholesale.com although I am not sure they carry the specific product lines you've mentioned, they are a full-service wholesaler to the grocery industry, and might point you in the right direction. Selling at a flea market
might be an issue with CW; I'd suggest just mentioning that you're opening a small store, taking over a bakrupt IGA location or something along those lines (if you don't mind a little cloak-n-dagger in your research.)
Frank