Suggest you try Auto Zone or Advanced Auto Parts. Pretty sure both
stores carry replacement gas charged tail gate and hood lift supports
at a reasonable price.

Be wary of the salvage yard hatch struts if you do go that route, as what
may seem fine in the yard will often time fail the first bit of cold weather
you get, leaving you with a hatch on your head.  I know I've dropped the
gate on my head dozens of times.  :-/  Autozone quoted me $110 to special
order a pair that would fit my former '89 GL Wagon ( RIP )-; ).  I opted not
to pay for replacements.  Course, if you don't mind going a bit more
redneck, a broomhandle cut to size works in a pinch.  (-;

~Brian