That looks like an ex tyre place one? available to the trade? sorry cant help further than that. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . ................................................................................... .......... ;DFNAR FNAR!! my trolley jack is so old it aint got seals!!! it has ball bearings which seal oilways, quality piece of kit, which i bought 2ndhand 27 years ago,paid a lot of money for it then(£50) and could have bought new one cheaper but smaller,
it has had some right abuse, lifts 5 ton, has long reach and high lift, wouldnt be without it!!
service it once a year, with a complete strip and regrease of all linkages and wheels, and a full hydraulic fluid change

looking back at how long Ive had it and how much i use it, can only say buy the best you can afford it will pay in the long run!!