You can get a AC
converter online for a few bucks. Partsexpress sells them. I use 2 80mm Panaflo L1's(outflow) and a 120mm Parts Express special(blow in) in my canopy. The 120mm is on 1 converter and and the Panaflos are on another. The nice thing about the variable converters is that you can undervolt them. I run the Panaflows on 6 or 9 volts and they are virtually silent. It will depend on how much of a heat issue you have though.
If you have any old cell chargers or old cordless phones plugs, these will normally work too. I am using a cordless phone plug for one of mine. It was a 9v converter.
*180 gal Display, 100 gal basement sump, 33 gal refugium, 3x250 MH, 2x160 VHO actinics, zoos, some softies, LPS & lots of acros and other SPS.
*100 gal prop tank plumbed into main system w/ 2x96 PC lights and 1x150 MH,