I think that's usually part of a glansplasty sometimes...if I'm not mistaken.
Unfortunately, it's really hard to find finished results of phallos online, so your best bet might be calling surgeons if you had a particular one in mind and going to consults to see what they are capable of doing. What I'm saying is there is such a thing of medical tattooing and I don't think the work on Crane's site would have been done in a tattoo parlor. I could be wrong, but yeah.