the advice gramage gave is good..any reputable tattoo artist can design you something.
key is choosing the best tattoo artist to capture the style you are after. each artist has their own particular style or forte. are you looking for something japanese? black and grey? realistic? portraiture? someone who does bold colourful tattoos may not be as skilled at something like portraiture, which takes a light touch...
if you know what you are looking for, and can describe it or post some photos of stuff you like, perhaps those of us that know artists working in this city could suggest someone.