I did read. A lot of people don't know you can ship the barreled actions and its $20. Close isn't always best either. Shipping is always "close". I didn't see you recommending any and I don't see any recommended close either.
Some people have issues with shipping any type of firearm. I don't want to ship one, especially one that has any sentimental or emotional value that cannot be replaced. If you like to ship your firearms that is your choice. And I would think anyone that wants a barrel threaded and has been shooting enough to buy suppressors knows you can ship firearms. You want a reference to ship to then use Wilson in Arkansas or Clark in Louisiana. Yep, either one is as close as your shipper. They both have national reputations.