Nice looking machine, I do not have any reverse discs at the moment but there is a guy that should have them called Hank watkins , I believe he always keeps a few reproductions on hand, I don't know his number but someone on here should have it for you.
I got a reverse disk for my '58 from Bob's Lawn and Garden Tractors, a site sponsor. It's been a few years though.
Looks like a good tractor. Keep us posted on your progress.
Bobs now has them Hank no longer sells the reverse disk.