@cammas I was looking for something similar for my other half and bought one of these:
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With an eBay discount deal the price started with a 6. Finding a shock may or may not be easy, I got a Manitou McLeod for a decent price from Wiggle at the time.
Fits older standards, and I can't spot anything wrong with the frame. She just uses it for fire roads and light single track near home so it hasn't been challenged with anything rough.