Yes!
Radio Shops do exist.
They are geared to mainly 800 Mhz trunking and commercial usage
There are about 4 shops in Charlotte that are pretty much sales & installation only.
I know one shop handles Motorola Sales & Installation
I know one that handles Motorola & Ericison (GE) Sales & Installation.
One shop deals with EF Johnson
One shop deals with Vertex and Kenwood & Tower Space Rentals
There maybe some other small shops that are not as popular as the 4 major ones are.
The big push here is the sale of State Viper & Digital Radios
Much of the Motorola stuff that comes in for service pretty much goes back to the depot for repair or is not supported anymore.
Just like Motorola doesn't support or repair their Minitor I, II, III, & IV pagers anymore.
Take care,
David