I can't see any reason a hydralic repair shop, or a good machine shop can't repair any hyd cylinder for ya ! if your handy ya can find seals
at most hyd shops to repair it your self! if machining is nessary, most any backyard shop can fix ya up !! It could be something simple, just ck it out! seals
and O rings are easy to find no matter who bilt the unit !!! All seals and bearings are metric, so ya can get parts
for things of this sort unit most anywhere ya are !! just sayin hydralics are not that hard to fix !!!