The RH pedal operates the wheel drive clutches [and hence forward/reverse selection], via a linkage. The linkage rod looks to still be in position, from your pic.
Not hard to fabricate one of these, if you have a few sheetmetal and welding skills, or know someone who has.
It's part number 27 of Illustration 2 in the IPL for your machine, which is a free download for ODK subscribers from HERE
The file is named 'tractor5vevr8vevr10vevr11vevr.pdf'
ODK member 'prd' has several of the Tractor models, and could probably measure up the critical dimensions of this part; I'd drop him a PM to ask.
Cheers, Gadge
"ODK Mods can explain it to you, but they can't understand it for you..."
"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."
