Yep, I've been building and restoring cars since my teens (in my 50s now) and I've had this wagon for a little over a year, spending about 90% of that time fixing or re-engineering stuff that the previous owner screwed up or simply didn't finish.
I feel for you guys who are trying to restore or customize a wagon to make it a REALLY nice car.
That was never my focus and I'm glad I didn't feel the need to make mine that nice. I use it as a year round utility vehicle and winter beater. I agree with the guys who say you need to be resourceful to have one of these. Pretty much everything it needed was able to be handled with what I had on hand. The stuff I didn't have, I was able to get, or I was able to get something close and make it work 'good enough."
The only part that almost became the end of me was the wagon specific fuel tank sending unit. I tried modifying a coupe/sedan unit utilizing pieces from a universal race car fuel cell sending unit and I couldn't get it to work right. I was finally able to find an original Wagon sending unit that I was led to believe was NOS. The guy knew what he had and he bent me over for it too. When it finally arrived, I found that it was used. But still, I HAD TO HAVE IT. It only took me about four months to get a working gas gauge.
I agree with the others that while we're a passionate group, in the grand scheme of the car hobby, we're a minority and the aftermarket parts suppliers aren't going to step up for such a small minority.
I still have my 68 Cougar that was my first car. When I first got it, 1978, my Dad was smart enough to order NOS parts from the dealership. As the years went on, those parts started drying up. They never had the following that Mustangs do which you can buy EVERY SINGLE PART for. Now, there has been a bit of a resurgence thanks to a handful of guys who hoarded the parts when they were plentiful and are now offering them to the public. Yes, a few of those guys know what they have and are charging astronomical prices for the stuff. But the others are just glad to see the stuff going to a good home in order to help even more of the cars get back on the road.