Agree on rebuilding.....cylinders are very basic in design and I have never seen one that couldn't be rebuilt due to seal failure. Unless you run across a truly smokin' deal on a replacement, I'd even go one step further......take that one apart, take the pieces or just the seals to a local hydraulic shop to match seals or match them up from seals available online and install them yourself. There's real satisfaction in doing it yourself, lots of online info on the subject and you'll know a little more about hydraulics when it's done.