Anybody reproducing old style speedo gears?

I bought the black '72 from Lew & enjoyed it for a while.

Starter died, so I got under it to replace it.

I saw a rust patch on the frame under the cowl at the bend, so I have it a poke with a screwdriver.

The screwdriver hit the transmission, that is the only thing that kept my hand from going through the frame.

I looked it over well after that, the frame rails had issues all over. :-(

I parted it out & used the 360 from it in a 1970 Barracuda I bought later.