Farnell has some nice small ABS casings that can fit both 3DR style radios as well as XBee's on their breakout boards. You can cut parts out easily with a hobby knife. I use them for both the airborne and ground radio's. Link & pics:
RX2007 ABS casing
Comments
Took two and a half months for Newark Element14 to ship for what ever reason, but yeah, great little boxes! I have the 915Mhz radio set from RCTimer and I have a near fit on the ground radio, much like the above photos. Just taking the heat shrink off the Air Radio to see how it will fit. Finally I don't have to worry about the delicate daughterboard. And the link posted by GJ Baarda - the Conrad connection, has more project boxes than you can shake a stick at.
Im using these.
http://www.eley.co.uk/en/ammunition/subsonic-hollow/
nice