The Uniden 510 is a good, simple unit that will mount in tight places. They usually run around $40. Mine has held up for 15 years of on and off-road abuse. You could get them at Wal-mart and some of the auto-parts stores like AZ, Advanced or Pep Boys. I even found one at a yard sale for $1 that works great. I think my brother bought a few off ebay.
As far as antennas, Radio Shack and truck stops are good sources. If you are in Lancaster, there used to be a big rig shop off Rt 72 that sold Mack or Peterbuilt stuff. I'm sure they would have antennas and wires. I'm paritial to the 48" 1/4" dia. flexible fiberglass antennas on a solid base. There are 1/2" round hard fiberglass that get spring mounted, but they seem to swing and wack into your top and other things fairly easily. There is another truck stop up off Rt 222 that has similar stuff. I'm on my second antenna and I got it there.
- Dave