^^^
I bought 3 round 1/2" AR500 targets from MattMoser recently.
As mentioned, a great guy to deal with, plus he's a real gun nut.
A bonus is that he lives north of the border, so shipping, duties, etc. are nowhere close to importing something from the US.
Besides, he prices his targets very, very reasonably for us CGN's.
Matt showed me his own 1/2" AR500 targets which he has shot .338LM and .50BMG at..........hardly a mark is left.
I highly recommend contacting him if you want some good steel to shoot at.