KKM barrels are USA mfgr, and they do sell direct. I just ordered a KKM 9mm conversion barrel for my G32 from them last night. They are a little higher cost wise than LW, but I liked the many good reviews I read, and I liked their delivery time. This is my first KKM barrel, having bought Bar-Sto conversion barrels in the past, which have been good too.
KKM barrels are described as "match quality drop-in".