--- Law firms for O visa for parent of Thai child dependent ---

I would really appreciate any recommendation of law firms who are experienced and capable with this sort of visa, with good customer service at a reasonable price. I've done some searching around and looking at reviews of various firms, haven't yet found one I feel comfortable with.

I'd like to do a brief phone or email consultation with maybe 2 or 3 firms to tell them my situation and get their proposal. I'm not sure if it matters much where the firm is located, like if there might be any advantage to using a firm with an office in Phuket or not. Thanks in advance for any thoughts.