The motors. If you want "budgetfriendlier" motors, you're looking at the 1000W Chinese scootermotors from ebay and simular.

otherwise, Iskra has several usable, but heavier motors. Finding those , any decent hydraulics firm can help there.

Other option is to get in touch with the Italian brand Movimotors. Brutus went from LEM130's to those, and it wasn't a bad transition.

Finaly, Ampflow. Expensive after importing them, but easy to find and order.