Homebrew would be your best option really, unless
KerhsawDesigns has something suitable?
Homebrew is cheap and easy though, just need a couple bits of L-channel aluminium ( 1/8" thick is plenty ), a hacksaw & files, and a velcro strap or two. Heres what I knocked up for my Zippy Flightmaxxes to go into my TXT-1:
http://i115.photobucket.com/albums/n...Mulligan93.jpg
http://i115.photobucket.com/albums/n...Mulligan94.jpg
http://i115.photobucket.com/albums/n...Mulligan95.jpg
http://i115.photobucket.com/albums/n...Mulligan96.jpg