First off, using all capital letters in your post is kinda like considered YELLIING our message...
I see this lift is able to get quite high in the air. This is a concern to have it working properly for the safety of the operators. If the maker no longer supports it, then a good reputable machine shop maybe the way to go. Not sure of the part you need, but my bet is there is some one who can make it for you, for a price. The hydrolics should be standard stuff, unless this an import machine.
Best of luck, Kirk