I went through your exact scenario a few months back. Disassembled old jack started calling around for seals, etc. Ended up buying a new Arcan XL325r Low Profile jack at Costco for ~ $100. Once I factored in seals, hydraulic jack oil, time running around hunting them up, the fact my old jack was 15 years old, etc. the decision was easy. It's pretty much identical to my old jack, both Chinese made IIRC and I figure it will serve my occasional needs well for another decade or so.