I agree, drive the car and enjoy it. If you can keep the repairs and improvements to weekend projects your more likely to have an enjoyable project.
Pm me if you need specific photos. My car is largly original some aftermarket repo parts to keep it alive.
I drive it every month of the year! Top down!
As for your brake parts, as others have stated the parts are available, rock auto is a good source for the parts. Don't have to buy from them but it will most times give you a part number
Also mymopar.com has factory service manuals and parts books.
Many times if you have the original part number you can Google it and find a replacement part.