I've purchased from Connecting Threads before and was happy with their quality. Unfortuanately I don't remember what the least amount you can buy. Also Fabric Depot is a good source and I have read several times Hancock of Paducah has also was used by many quilters. It might be nice to have a little extra for just in case! Another suggestion is look in the for sale area or ask if anyone has the fabric you need. Sometimes some of us quilters will have it in our stash. Can you post a picture of the fabric you need? That way your colors will compliment your selection you have used already or others can see what fabric you are in need of.