I'm a bit late to the party in this thread, but I was surprised to see that nobody recommended installing some L-track inside the van. I installed some on my pickup truck a few years ago before I got into diving, and it has been amazingly useful for all kinds of loads, including dive cylinders.
I made a post on this in the DIY forum last year. Take a look at the thread, and see if something like this will work for you. The track itself runs about $8 per foot, the little moveable attachment fittings are about $5 each. Throw in some stainless hardware, and you have a sweet, modular, reusable system for around a hundred bucks.
I made a post on this in the DIY forum last year. Take a look at the thread, and see if something like this will work for you. The track itself runs about $8 per foot, the little moveable attachment fittings are about $5 each. Throw in some stainless hardware, and you have a sweet, modular, reusable system for around a hundred bucks.