short range radio audio transmitter am or fm?("bug")

I tried posting this on the sci. and alt. electronics newsgroups, but I didn't get any response, and roboticists are generally electronic-wizish (if
you see what I mean) so I thought I'd post here. Maybe I have misworded my post in such a manner that it drives respondents away, that seems to happen to me.
I am looking for a sort of wireless mi rophone that's really small to use on stage(we want the actor to wear it). I looked at commercial ones, but they're way too expensive. I was hoping to make a simple one myself(it doesn't have to be great sound quality) and, after looking at some kits I came to the conclusion that the simple fm transmitters were unsuitable because their broadcast frequency probably shifts too much and too easily since none of them are crystal controlled.
Could I use a VXCO somehow to transmit FM? (maybe with a frequency doubler or something)
Does anyone have any good designs for stable FM transmitters? (I found out there's 2 nice single chip transmitters, the BH1417 and BH1416 by rohm but the design in the datasheet is for line input only. I guess I just add an amp and a mic? are there any components I could leave out from the datasheet design to simplify it?) also, the single chip designs have AGC, so that would be a plus.
Could I just use a 1 MHz oscillator (like a can type) and some discretes(including a mic) for a transmitter?
I found a good looking design at http://www.techlib.com/electronics/amxmit.htm for an am transmitter, but again it's for line level input, and adding an amp would make it larger still.
Thanks for any suggestions, all are appreciated.
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