If you're looking for a specific custom head to be made for you, I would suggest that you consider the MiniMee heads that are offered by D.I.M. I don't have the link offhand but if you search "MiniMee" on DoA you will find lots of information very quickly. D.I.M will sculpt a head based on the pictures and concepts that you submit. The MiniMee heads are very popular, especially for people recreating anime/manga/game characters or getting headmolds of famous actors/singers/etc, but the original concept was that you could create heads based on yourself or your loved ones, or a character that you yourself had designed and was special to you. If you search the gallery for MiniMees you will find tons of examples as they have been very popular the last few years.
Sorry, I meant to answer this last night but I've been really busy of late.