Steep Turn
Your comments regarding the repairability of Pipers does not reflect my experience. I know they have recently made parts for out of production 50 year old models.
So far as parts go Piper still make these airframes so there should be no problems with parts. One thing Piper do well is make parts that are used on a variety of aircraft. The 161 181 236 models use the same basic airframe. The Cherokee 6 and Seneca fuselages are basically the same, a Seminole is a Twin Arrow IV etc.