He made another thread selling the rest of his stock. Pretty sure they're gone for good. There is a vendor here though that sells a little different one
They are awesome pieces, it's too bad that other companies started making them. The quality doesn't even compare to my old ones, but people are price shopping and I don't blame them.
I have one of the very first batches that the shop screwed up which I got at a discount. Had a friend fix it on a lathe and now it's perfect. Very nice design, best plug made much nicer then brand "X". Perhaps others would be interested in a new run of these plugs