Velcro works well, but you'll probably need some expensive stuff to do it right. I picked up some Velcro at Walmart and it only lasted a few months before it stopped holding right and I had to zip tie it on. I got a pack of zip ties from Harbor Freight Tools for only a few dollars and it has a few hundred of them in there (plus they're colorful! :p). If you could find some of the zip ties with the little tab on them that you can press and release them that would be the best way to go, zip ties hold on really well.