I bought a Honda 50 motor from a ebay seller... The motor came packet in a Brand new Colman 48 QT cooler,,, Wrapped in brand new Bath towels... The motor itself was spotless of grease & oil. So I ended up with a bonus....
Look at Home Depot plastic storage containers. Cheaper and rated for actual weight. https://www.homedepot.com/p/HDX-17-Gal-Tough-Storage-Bin-in-Black-SH17GTOUGHTLDBY/205808350
But I still would have had to secure it in place so it wouldn't move around. I had to make sure it didn't poke a hole in the end with the input shaft. I am quite sure FedEx could have found a way to break it off if it protruded. In the end, I built it with pieces I had laying around. All I was out was some time and some screws.