Drive it. Put a towel down on the back seat, then screen face down, with true bottom against the back of the seat. Another towel draped over, then buckle it in with a 3 point seat belt (don’t want a 50 pound projectile if you get in a crash).
I’m being serious. It’s been a while since I have heard of anyone shipping one without at least a little damage.
Another (expensive) idea is shipping in 3 separate packages: CRT, main cage with logic board, analog board, etc, and finally the case itself. Lots and lots of bubble wrap will get the last two items delivered no problem. The CRT tube would require some special form-fitting foam to form a caccoon of sorts to protect the neck, then a bunch of bubble wrap.