I have a topper on my pickup truck. The rear door lifts up and has these
two things that resemble small shock absorbers. Apparently they re
getting weak, because the door dont stay up very well anymore. I'm tired
of that damn door hitting me on the head. Temporarily I have been
clamping a vice grips on one of those things to keep it up if I'm
loading or unloading a bunch of stuff.

However, I'd like to replace them if they can be bought. First off, what
is their correct name? Knowing that, I can google them. But changing
them wont be as easy as simply remove and replace. They are riveted on,
so I'll have to grind or drill the rivets off and replace with bolts.
Then too, if they are sold, I suppose there are different sizes so I'll
have to find a match. The topper is an after market thing and has no
brand name on it, so I can only go by length and diameter.

Of course if there is an easier solution, such as some sort of prop, I'd
consider that too. -OR- can the ones I have be repaired? (It dont look
like they come apart).

Thanks in advance!