I imagine Doug is thinking of something like this to attach the joystick to.(clearview type?)
www.orthobionics.com/rehab1/pointers/64.htm
This is the first one that came up in a search, I'm sure there are other alternatives possibly less expensive.
It depends how much Doug wants to spend and how ridiculous he's willing to look. (j/k Doug!)
rcpilotsteve(may I call you Steve?), Are you going to install the gimbal in a Radio Shack project box or similar, and what do you think it might weigh? I'll have to see if I can find one of these headpointers locally to get a look at before I get any ideas.

Take care, Dale