Rumor has it that a new shop at Blythes Sports in Valparaiso has a FFL/SOT for class 3 transfers. There will be two stores in one, Copper Custom will be in the back of Blythes Sports and will carry all sorts of fun NFA stuff as well as doing transfers. It's under construction now and the license is already in hand.
I believe that Bare Arms in Noblesville is also a Class III. I got a suppressor from there at least. It was a couple years ago, so maybe they got out of Class III.
Tri Star Engineering, Tactical Division
3000 W. 16th Street
Bedford, IN 47421
812-675-5320 www.starforce.us
Ask for Angee, they have SBRs and Silencers in house, mainly Daniel Defense and SilencerCo but they have only been open for Class 3 sales since October 2016