Tom mentioned something about holding out for the new 30 year artificial knee, this in a thread of a year or so back about artificial knees. This group in Vermont seem to have a pretty good facility and routine, certainly sounds cutting edge to my innocent ears.

New Knee Implant Option - VERILAST Knee Technology from Smith & Nephew - Fletcher Allen

This site has some information about knee replacement surgery abroad:

Knee replacement cost - cost of knee replacement surgery

Estimated cost of knee replacement surgery:

Country Price (USD)
United States $45,000-$60,000
Singapore $18,000-$22,500
Thailand $12,000-$14,200
Taiwan $9,000 - $10,100
India $7,000 - $11,200

I'm guessing that you're not necessarily going to get the latest hardware and procedures in India or Taiwan, or any of them for that matter. But I might be wrong on that. Bears investigation.

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Te futueo et caballum tuum

1986 300SDL, 362K
1984 300D, 138K