Yes, go out of town if you have to, and go to an actual tractor dealer--they have the most incredible selection of parts, from copper/brass washers to 0 gauge cable. I cannot emphasis this enough to Kaiser owners--when I had to get my 49 K engine rebuilt, the local small town FLAPS which mainly services tractors, marine engines and trucks had virtually every single part I needed for the complete rebuild of a Continental engine ON THE SHELF. A few parts--some of the pistons I believe, came in next day from their local area warehouse 100 miles away. Continentals were used in Massey-Ferguson tractors, Clark forklifts, and all sort of other industrial equipment such as irrigators, compressors, and generators. Not two miles from me, I can think of at least 5 or 6 pieces of Continental powered equipment still being used--or painted up and shown off--by local farmers.
Also, go to a heavy equipment dealer/truck repair/tractor place if you need competent lube jobs done, or your king pins rebuilt, or a generator redone. Lots of garbage trucks/landscaping tractors/transports etc are still around and truck tractor places understand zerks and king pins, long after your corner garage has lost the knowledge.