Heres my situation: 

I buy products from Vendor B and they ship direct to us, however we do not get billed from them. Anything we buy from Vendor B is billed through Vendor A. We have alot of bills form Vendor A so when I want to find a bill from Vendor B I have to search all through the bills from Vendor A and I dont have an easy way to search or find it because Vendor B doesnt exist in quickbooks. I see there is no way to add a sub vendor so I was wondering if there is another trick or way I can add vendor B somehow when I enter bills for Vendor A so I can find them.