im not familiar with the west coast at all. the only CB shop i really know of out that way is the shop at the A1 truck wash in fontana california. im sure there are others, but i go to the west cost on average of once a year, if that lol.
Don't know of any shops in sin city, but are you opposed to installing it yourself? it's really easy to install/set up, plenty of us radio guys are here to help you....plus not only do you get to learn something new, but if your radio ever went out on you in the middle of no where and you had a spare, you'd know how to hook it up/set it up and not be w/o a radio.