If Warner won't help you out, I think you could find someone to rewind the coil for you.
You don't have it fully disassembled in your pics, but it looks to me like the thrust bearing failed and the heavy backing plate wore into the coil.
You should be able to find clutch frictions and steels through a good transmission shop... If you can't find someone to work with you, I can put you in contact with a guy who will help. The backing plate may be able to be made, but it may not even be bad. Depends how that thrust bearing wore into it. I'd like to see some better pics of the backing plate and clutch disassembled. Looks like maybe it had too much pre-load applied to that small thrust bearing, or they had a lube issue going to it.
I've literally been into hundreds of tractor and automatic transmissions.... I'd take a crack at fixing that thing. You did the hard part honestly... and that was disassembling it to get to it!
I'd say that there was such an issue with these things that MTD got tired of working on them. It wasn't that there wasn't money in selling a clutch, it was just they literally didn't want to deal with their mistake.... all they had to do was say,
"Oh, we're sorry, they no longer make that part." and boom. No more repairs on that machine.
"Here, we'll trade it in for you on a brand new piece of sh!t!!"
Nice job on all the work Sam!
