I use LMR radios made by Midland, Maxon, Kenwood, Vertex & Johnson.
I have programming capabilities for all these radios, but the Kenwood TK-805D can be programmed from the front panel by moving a jumper inside the radio.
One important note...
many if these radios were made to cover a specific frequency range while having the same model number, with a freq designator added, such as the TK805D-1,2,3 or Midland 70-1530A,B,C,D where the last number or letter indicated the freq range, such as 420-450, or 450-470, 470-490, etc.
Be sure of the freq range if you go for one of these radios.
These types of radios are great for GMRS mobile use, real heavy duty and come in 25w and 45w versions. Power output is often user programmable via software.
Like Steve said, these radios are often very inexpensive on ebay, depending on the availability to program them.
If you need programming services, you can e-mail me.
Using amateur gear does not work too well because the the radio will lose a lot of sensativity and power output trying to tune so far out of band (462/467mhz versus 420/440mhz).
Also, your amateur dual band antenna will typically not be broadbanded enough to cover this range without serious degradation to your match.