stunner:

One of the guys in our flying group has a glider launch that you piggyback on the top of a trainer plane and it works pretty good. The trainer we use is an older hanger 9 extra easy (blue and white version not the easy 2). Hanger 9 makes some add-ons for that plane such as a camera mount - drop box (bomb drop) - glider launch bracket. If you can find a LHS that handles hanger 9 stuff you might be able to find one or atleast order it from them. Basically all the glider launch is made up of is 2 plates with a few crossmembers and a servo mounted in the middle to pull the release pins from the rubber bands holding your glider on top.....pretty simple design actually.

[link=http://www.modelairplanenews.com/ma/reviews/xtra_easy.asp]Hanger 9 Extra Easy[/link] <-- scroll down towards the bottom for the glider launch bracket pic.

Looks like leisure time (never dealt with them before) has the hanger 9 glider launch for $17.79.....hanger 9 part number han1325
[link=http://www.leisure-time.com/han.htm]Leisure Time Hobbies[/link] <-- they are in Illinois

Hope that helps,
Madd_Maxx