Dear Christain,
Any real electronics store (probably not radio-shack) with an
abundant stock will have very small ccd fixed lens cameras in black
and white very cheap - as little as 50 to 100 $ and color ones around
twice that. You'll then have to work out a battery powered miniature
transmitter to get the signals to a receiver off stage. That's the
other half of the adventure.
cheers,
Bud
Bud Blumenthal
Cie Tandem asbl
58 rue de la Lys
1080 Brussels, Belgium
T: 32 / 2 / 425 89 37
Fx: 32 / 2 425 89 39
eMail: bud@skynet.be
http://users.skynet.be/bud-dance/