We build our own crates with 1 by 1s as the frame, 3/4 plywood as the tops and sides.
Probably costs 30 to 40 bucks for the wood and screws, etc., but I know my motor is going to get somewhere safe.
We bolt the motor down to the crate, then pack it with some foam, plastic bags filled w/ peanuts, etc.
I've seen horror pics of too many totes dropped off loading docks. With the reinforcement we put in the crates, they'd have to drop it pretty high up and multiple times....