Doors are out there, it's a matter of shipping and finding someone locally to search for you. Since WA and OR, and now CA went with the EPA Certified stove use only law, quite a few have been scrapped in those western states. Here's link to a dealer in Oregon that offers stove removal. Check out their stove stair climber. I could have used one of those a few times !
http://stoves.com/stove-removal/
They may glean the doors off them for you if you ask. Shipping is the killer, figure approx. a buck a pound UPS Ground. So you have to get them at a good price.
I have 2 contacts in the western states with doors. One has 2 sets of GM and one set of GP, and 3 GM rights. These are new old stock nickel as is from foundry. $20 a piece. ($40 a set plus shipping is approx. $80 per set) I have pictures if interested. The other occasionally gets Insert doors complete, from used scrap stoves. I think he has one set now in CA. Not sure of his price, he tried ebay last year, and they didn't sell. He is THE best source for reconditioned Fisher Stoves on eBay. Many of his stoves are pictured in this thread, and he is soon to be a member here.
Over the years, Inserts were the least favorable and scrapped more than stoves. Using the Grandma doors, this would be in your favor. Scrap yards close to where they were made is the key to finding them since those areas were more populated with the new stoves.
UPS has increased their maximum shipping weight from 70# to I believe 100# per box. Here's the door weights without handles or draft caps; GM 22#, GP 23#, . So 4 doors per box works with them. Used doors with handles and caps are a mess to ship in much larger boxes. Been there. Figure roughly a buck a pound Ground shipping.
You know I'll appreciate any drawings, and reimburse you copy and shipping charges. They will not be posted anywhere to prevent another wave of copy cat stove builders, I assure you.
The curved hinge plates were welded to the stove front instead of the angle iron corners as shown below on both GM and GP. I call them "outboard" since they are both outside the door hinge ears. Maybe some revised prints will show a different door mounting?? Not sure what they are and where they came from. I'm sure studying those prints will give me a multitude of new questions.