5K Hood & Wagon Pressure Cylinders

[Steve Sherman]

I have a couple of 5K TQWs (and 86 & 87) which have a problems of
dropping the hood and rear hatch onto my head.  Since the problem gets
worse in cold weather it's probably time to fix it, e.g. replace the
pressure cylinders.

My question of the group is, are these pressure cylinders a dealer only
item, or are there generic replacements that can be had at the local
parts chains that work as well.

Any experience (and part numbers) out there?

TIA

Steve