Sorry, I really have no idea who is going to provide a multiple service like that.
All I can suggest is that you look at mail forwarding companies in the US to see if any of them will forward to multiple addresses. If they don't, then as I said, you will have to open multiple accounts with one to cater for each supplier and that is going to get very expensive.
Just look for "US Mail Forwarding Companies" in Google, you'll find plenty and you can start narrowing them down form there.
Cheers