We seem to have the opposite of this problem in Indiana. There are several quality Class III dealers.
Bartee Transfers in Bargersville, IN.
SSNFA in Hendricks CO, IN.
21st Century Firearms in Bluffton, IN.
They are all excellent businesses to work with. Definitely sorry to hear about poor customer service from other places. I do see that a lot in several gun stores, not just SOT/FFLs... I've been to several shops where it is as if your mere presence in the store is offensive.
Caution: Author suffers from foot in mouth disease.