Virtually any bottle jack will work sideways IF you put the pump cylinder on the downhill side. The fluid in the main jack body must be able to get to the small cylinder that does the pumping. We used 20-ton jacks for frame straightening at Dad's shop all through the 50's and 60's.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!