For those of you, in the San Fernando Valley, that have gotten any body work done, where exactly did you get it done?

I have some body work done, but the work wasn't as good as I wanted it to be. They have an expertise in OEM work, but as far as aftermarket work (ie. prep work, shaving to make things fit, etc., etc.) where have you gotten things done? I have a KurumaZ bumper but the corners needed work on and they couldn't manage to do it themselves. I'm going to be getting another pair of sideskirts soon and I don't want them to mess these up. SOOOOO, for anyone with a positive input, I would love to hear your referrals. Thanks yo!