Need help finding legitimate supplier for export

So friend of ours is in charge of the sales and purchasing department the massive meat distributor in the Balkans and they've pretty much given us the ability to supply them with 100 metric tons of chicken gizzards every month (they already have other suppliers giving them the gizzards but this is just a way to help us out and start) and all we have to do is just find someone to pretty much send the order to them. Problem is I have dealt for years with China on products in chemicals and hardware so I've experienced now and then the occasional scam which makes me really paranoid because I've gone on the B2B marketplace I have collected quotes but I just don't trust any of these companies yet especially with tens of thousands of dollars up front to start the shipment but I do need to find a supplier soon that I trust and that is profitable before me and my partner lose this opportunity so I was hoping someone here could recommend places that are possibly legitimate and really easy to find if someone is a real supplier / producer of the chicken product especially since if this contract goes well they want it every month and it could lead to access to a lot of other meat products.