If you are looking for laser engraving, check out Hi Caliber Manufacturing in Ashland, Virginia, Carey does great custom work, I have seen a lot of his work. Check out his web site and Facebook page for examples.
Not sure where you live but I had a great experience with Tarheel State Firearms of Charlotte, NC. They are very well known and have been in business for a long time. Had them do some laser engraving on my AR-15 lower receiver and they did excellent work.