Yeah I saw those "fan bracket" in Pudu Aquarium before..the lady boss gave me for free after I bought the Resun light..unfortunately they are not wide enough for my 10mm glass ..anyway this is my simple design of holding the fans in place..(those are stainless steel rod..very rigid!)
It's better u place them in the reflector...should the air suck in or blow out
of the reflector huh???

http://www.geocities.com/cjm88/index.html