Hmm, tough one. Have you got any basic metalworking facilities to make your own strap with? If you can't, you'll have to buy one - I don't know whether the dangerden holddown would work, if you cut the nylon bolt down so it didn't interfere with the fan. It's a great clip, at least for my waterblock, and it ought to hold your globalwin and pelt fine. Have you got a coldplate as well?