Really bro it's not that hard to do on your own! Wiring the inverter could be tricky if you don't know what your doing and of course breaking needles off the gauges can get expensive. I would think you could easily find someone in Cali to do it for you. {Where did you buy them?}
All you need though is a screwdriver, some steady hands, glue or double sided tape, and some wiring skills. There's a certain satisfaction you get when you do it yourself.