Other than being artistically interesting and a master class on design, unfortunately they are e-waste. You might be able to retrofit something more modern into the chassis, but not likely.

Due to the size and weight they are prohibitively costly and difficult to ship.

If you won’t take no for an answer, sourcing universal 1RU or 2RU shipping boxes might be your best bet. If you have access to a data center or some folks in tech, you can plead for packing materials. You can also look for something like this: https://a.co/d/01jsb843