If you are looking for a small servo to work the throttle, release a bom or what ever here is a small one cheep - especally if you buy several to cover the shipping.  This is the same place that all of the cheep Easy Start Cox .049 motors came from.

http://www.coxmodels.com/prodinfo.asp?number=005500

I havn't bought and tried any my self but they look like they should work

 

Also they have a 3 channel transmitter that possibily could be modified to talk down the flight line wires.  This would be for the electronic savvy only because it probbly would take quite a bit of doing to make it work. Besides Clancey's stuff is priced right and is known to work.

http://www.coxmodels.com/prodinfo.asp?number=005618
 

What a cryin' shame that Cox will be an old name from history rather than a viable company in this golden era of modeling.
Chris...