Glad to have some rich friends visiting!
Welcome to the forum. The saw blades are just standard reciprocating saw blades that were machined by our in house machinist, Bob. He'll probably be along eventually to say whether he has any left or not, but he made them some time ago so I can't say for sure.
I made the video with the saws he had sent me, well over a year ago, and the blades have held up quite well. They are designed to be used with much greater force than you can apply with your hands, so they stand up better than hacksaw blades seem to, but you also need to put a bit more elbow grease into them because they are a bit on the aggressive side.
They do work great though- like I said, they've stood up to a reasonable amount of use, and they give many more options than standard saws would.
Def