NovexComm is providing low-cost, professional rack mounts for several popular radios, giving operators a source for off-the-shelf, low cost rack mount kits.
Not dirt cheap, but not exactly audiophool prices either. $80 is not a terrible lot of money when you think about drilling, cutting and filing on a piece of 1/8" thick sheet metal, plus the inevitable mashed and cut fingers.
http://www.novexcomm.com/ $80 isn't bad for the cut out front panel. If you sell that ricebox, you're kind of SOL, though.
I use these more generic rack shelves at work, they come in 1, 2 and 3 rack space tall and much cheaper.
http://www.bswusa.com/proditem.asp?item=U2Here's a vented universal job with rubber covered clamps.