Gunsmithing Marlin 1894......"New style" parts conversion?

[TresMon]

So a customer has given me a(true) Marlin made Marlin 1894 lever rifle chambered in 44 Rm to fix.
It's not a "REMlin" with the "new style" parts as listed and called by Numrich.

The carrier (cartridge lifter) is worn out beyond service. The gun gets the classic "Marlin Jam" every time ya work the lever. Jams tight requiring lever to be removed to unjam the rifle.

I can't find a new, "old style" carrier anywhere.

1. Anybody know a source for a new "old style carrier" (has the rocker in the side.)

2. If I put a new style carrier in it (has a plunger button in the side) what all other "new style parts" have to be changed out? (According to Remington, several.)

3. I welded up the ramp that the "snail cam" on the lever interfaces with and machined it back down to spec. No help. The carrier is just pretty much worn in every critical dimension.

Any body know anything at all that can help??

Thanks!