460 MHz VRMs

[chrismal]

Harford County operates on a 460MHz Motorola RDLAP data system. We use VRM850's and 650's. I'm trying to find available VRMs that we can use until we migrate to the next data platform. Motorola no longer manufactures these units for 460 MHz.

I'm also looking for any information or a source that would help me to identify 460MHz VRMs by their model numbers. The 850 model number we have is F4451A and the 650 is F3451A. I'm trying to determine if there are any earlier VRMs that will work on RDLAP and 460 MHz.

Any help is appreciated.