If you google map search "Katzkin dealers" you shouldn't have trouble finding a relatively close dealer/installer. Trustworthiness of the dealer is not that big of a concern, but I'd expect to pay between $1200-1500 for a kit and install. Is it worth it? Sure, if you want leather absolutely go with Katzkin. Roadwire is also another good option to check out.
For a reference here's a recent shot of my Katzkin setup.