[Ford-ferguson] 9N Fender Bolts Sizes

[cwi813 at mchsi.com]

I'm taking off the rear fenders of my 9N to get rid of some rust there then repaint it.

All four bolts are rusted totally, and some are so close to the fender that cutting them off with my 
Moto-tool cutting blade would be risky.

I've tried PB-Blaster, but that hasn't worked. They are one solid mass of rust. Any other ideas?

On both fenders, the bolt-head-size on the bolts closest to the front of the tractor are 15/16" - but the bolts just to the rear of the front bolts are 1-1/16" .  When I put new ones in, do I want to keep them that way or are they supposed to be different than that?

I need a new draw bar and whatever it takes to hook it up to my hydraulic system, which is in great shape. where do I go to get that?

Thanks so much for your help.

CJ