Here's probably what you had:
https://www.lci1.com/power-stabilizer-jacks
Prices are fairly comparable anywhere you go. Prepare for sticker shock.
You'd be amazed at what is re-buildable. Here are pictures of when I bottomed out and absolutely crushed my stabilizer jacks:
https://www.flickr.com/search/?user_...ext=stabilizer
I gave them to forum member Bob Caldwell who had another forum member, OldCoot rebuild them for him. Once it was all put back together, they were better and stronger than before.
I tried to warn Bob as to how bad they were (with pics) and he responded, "one man's junk is another man's treasure".
If you don't repair them, at least offer them off to the forum. I'm sure someone will take you up on them!