Okay, I’ve received the backseat from the 69 Mustang Fastback. That cost me $74.99. I also have received my black seat upholstery, which cost $57.95. So for $132.94 I have my cushions.
My next step will be going to buy some cheap wood at Lowe’s so that I can build the prototype seat frame. I want to be able to completely disassemble it so that I can use the pieces of it as templates for future loveseats. I will then take, for instance, the front piece and trace it onto a piece of oak or cherry and cut it out according to that. Since I’m starting this from scratch, I might as well set the infrastructure up so that I can easily reproduce my pieces. When I try other years (or models, or for that matter, makes), I will see if any of the pieces from other loveseats fit. If so I will just write the new info onto the template. If I label the template with an identifying number I can create a database that would eventually be able to tell me if I have all the pieces for a particular year, make and model. For instance, if Front Template #0001 fits a 69 Mustang Fastback and also a 1970 Mustang Fastback and (let’s say) 1971-1973 Mercury Cougars, that info would be marked on the template.
At the same time, if I looked up the templates needed to build a loveseat for a 1972 Mercury Cougar loveseat it would list (1)Front Template #0001, (2)Side Templates #0103, (1)Bottom Template #0301, (1)Back Template #1001, (2)Arm Templates #8989, and (4) Leg Templates #0006. These are all made up numbers, of course, but you get the idea.
This is going to necessitate getting a place to store all of these pieces of wood someday. But at that point it means I have made and sold many different pieces and I believe the problem will take care of itself then.