Well I guess all you have left is Proline. Fail-safe method? You must have never had a job in retail. I've managed retail stores for 15 years and there are always inventory issues gun or not. Good luck with "not doing business" as im guessing all you are is a guy shooting .22 every other month, so no big loss for these guys.
I will no longer be doing business with TSE. I stopped doing business with Wholesale after their stolen gun fiasco as well. The fact the there is not a fail-safe method to control the inventory of restricted guns boggles my mind. This kind of thing does nothing but give the anti-gun groups leverage, and causes damage to our hobby. Also how would you feel if you or your spouse was a Police Officer and a bunch of illegal weapons were now in the hands of criminals and it was being brushed of as 'mistakes happen'. Sorry no second chances with me.
Clint