Try Lynx RF modules. I use them extensively for prototyping. Output data 115 Kbps, they are data in = data out with no need for balanced data to the modulator. 900 Mhz with 100's of channels using serial programming or 9 channels using external 3 dip switches. I have flown model airplanes using this set at more than 150 yards with no problem in the data link at 9600 bps with 16F and 18F MCU's.

Nick