Being as they're a mix (Tonkinese x Himalayan), I would not say they have a 'set' or 'definite' personality type. You can look up the personalities of both breeds and you could get a general idea of what it *might* be like.

In any case, try looking on Petfinder.com or at your local shelter for a kitten. They have all sorts of cute domestic babies and they may have the particular mix that you're seeking.