I haven't seen the bed itself, just a few images that I found in a search. It appears to be made mostly of tubing. The best option would probably be plumbers strapping. It's the same stuff they use to hold water heaters and pipes in place. It's extremely inexpensive and easy to find at most any hardware store. Just cut it to length, wrap it around the tubing, and put a screw through it into a stud. Here's an image of how I used it to hold a tv down so my 5 year old son can't remove it.