These are very commonly used when converting an older hydraulic steering system in hot rods and EV's alike. Tons of info on this and other sites on controlling them via CAN.
$100/ pump + Shipping

Vacuum Pump - $100

A/C Compressor for use with 3p motor controller 100-300v, from a Lexus RX400H SUV - $50
Light Liquid Fluid Circuit component Gas