Hi James, I am an old F4 guy myself and I mean old. I have owned my 200D sense Sept 2001. So far I have not had a problem with parts. Many parts are common to other aircraft of that vintage and there is a source for parts that are unique to the 200s from stocks that were acumulated by an idividual who specialized in Meyers. Other parts can usually be fabricated or repaired.
I have always been pleased with the way my 200 flies. It is very stable and trims out nicely. Mine has the spring operated aileron trim which doesn’t have a lot of authority but if you keep the fuel balanced it works. I tend to have just a slight ammount of pressure on the yoke prior to my time to change fuel tanks.
I still like my Meyers. It’s a great aircraft.