There may be another approach to your problem, however i'm not sure if it will give you the flexibility you want.

How about joining a lounge program based overseas. For example, you can join Air New Zealand's Koru Club for NZ$465 (first year, NZ$265 thereafter), and it will give you access to the following:

Air New Zealand Koru Lounges/International Lounges
Ansett Australia Golden Wing Lounges
Air Canada Maple Club lounges
United Red Carpet Club
Singapore Airlines lounges

Im not sure about any others, but i'll hazard a guess that they have reciporical loung access with all the other Star partners.