I bought mine about a year back - all-over polished, they look v. spiffy. They are only weak if, like me you lend the revolver to somebody who takes it to pieces and reassembles it without turning the locking screw. Then tries to ram a ball - the pin backs out and bends under the pressure.
I tried to get a local company in St. Ives to make a some a few years back. Sure they would - I had to buy at least ten and they worked out at about £80 each... I didn't go any further with it.