Here's another
ebay auction to consider, or at least shoot them a question about.
It looks to be a Hydraulic motor from a Crown lift of some sort. The big 36V Crown Forklifts in most warehouses would have big enough hydraulic motors to possibly EV with. If I were you I'd email them and ask them what it's dimensions are. It's not exactly cheap at $250, but if it doesn't sell you can always shoot them a lower offer.