I found some transmitters/receivers for under $100 each at this site.
They're used to being built into a remote controlled aeroplane, so it'll
probably be able to cope with the movement of a steadicam.
buy this and try it out if the shipping and taxes aren't too excessive.
the transmitter is only 30g in weight and 26 x 50 x 13 mm in size not including the
the receiver is a little bit bigger, here's
This belongs on the monitor for the Director/D.O.P.
The receiver comes delivered with a battery which is a big plus.
at 135g it's more than 4 times as heavy as the transmitter but
then again, lightness isn't a factor at this side. the size is pretty
reasonable for diy-ing to the back of a monitor.
Please, share your opinion
P.S.: keep in mind that it's sub $200 for both of them.