Perhaps someone can name treatment centers and/or particular specialists that could be considered, I can't and am not aware of any. I don't know how usual it would be that the therapy would, in fact, make things worse but there's a possibility that it'll offer little or no help either. Much depends on your friend, of course.

As I see it, your friend should be the one to take the first step and go see a professional to be diagnosed. Hopefully because he wants to take it, not because someone (you, the society, or the court) asks him to. The best guess is that most people with AsPD don't want to take that step. If your friend would go to see a professional and would be diagnosed, he just might lie to just get it over with -perhaps even getting a false diagnosis.

Medications rarely do any good and there is no certain AsPD drug to use (of course, some meds might be used/tried for example to make it easier for him to deal with aggression or to stabilize his moods) but medication usually is not affective.
Therapy may or may not help. If your friend wants to receive help, he might find some benefit. Maybe. Hospitalization is rare, and even if it was a possibility, I doubt if it'd do much good either. My guess would be that most hospitalized AsPD's are in programs because of getting in trouble with the law. Self-help groups designed for people with AsPD might be helpfull, but I don't know how common groups like that are. And yes: again we come down to the question if you friend wants to try to make changes or not.

If your friend has AsPD, you'll be lucky if he accepts or wants help and/or is honest about it.
Like you wrote,
"may be using this "I am willing to get help" scheme to keep me in his life to continue using me at his disposal, but hey, I figure why not play the game with the chance he may actually get some effective treatment)"
Well. Playing games with someone who has AsPD might not end up the way you hope, and there's a fair chance that he won't even get effective treatment in the process of playing. I don't think therapy'll do much good if it's all about lies, games and not wanting to receive help in the end of the day.
AsPD just might be the rubix cube that you can't solve.