Mounting a CB is generally going to be a bit more challenging than a contemporary amateur (ham) radio. Remote mounting options are plentiful, in the VHF/UHF radio market. With CBs... Not so much.
Luckily there are many CB radios that are very small. You will have to be creative in selecting a place to mount them, and remember that they don't HAVE to be mounted horizontal. Perhaps you could mount one inside the center console (you would probably need an external speaker and mic extension cord.)
You might also look at the Cobra 75WXST. It is the only remote mount CB I can think of.