A while back, I bought a foot box air vent kit from
www.cobraearl.com/products/ and as one of my winter project, decided to get it installed. I didn't use all the parts, but the kit had everything I needed. You probably could save some $$s and source the parts yourself, but I went the easy way. The 12v air blowers are boat engine compartment types. I used 3M panel bonding epoxy to attached the front ducts to fiberglass. To hold the ducts in place, I first took some safety wire and glued to the fiberglass using Weld epoxy. This allowed me to "safety wire" the ducts in place then apply the 3M epoxy using a wide wood popcycle stick. It all came out pretty good. Since my ducts had two attachment ports, I used the extra flex hose to direct the air to the disc brake rotors.
Mark