I know of some people who have had great success- and saved a lot of money- on dentistry in Mexico. The border (and 'tourist') towns are full of dentists. who cater to Americans/Canadians.
If it were me, I'd put ('type of surgery' abroad) in my favorite search engine and follow the leads as to country, location, and then BE SURE to follow up on testimonials, and try to determine the veracity of any recommendations. In the end it's kind of a 'buyer beware' sort of deal. You need to be comfortable with the competence of the doctor/clinic. You might even talk to a doc locally who does whatever procedure you're interested in. S/he may well have recommendations of peers- maybe members of (his specialty) association or training, or perhaps your local doc has handled follow-up on work done abroad.
Much as I love TUG, I don't think access to timeshares is the first criterion to base such a decision on. BTW- my 'quick 'n' dirty' research showed several of these overseas clinics (I searched 'cosmetic surgery') offered package deals with surgery and accommodations.
Jim