'02 A6 2.7T torque converter issue

[Ben Swann]

I am contemplating purchase of a 2002 A6 Quattro with 2.7T engine and tip/auto trans.
It has early warning of the torque converter issue that apparently is common to these
cars.  I am trying to get any more info as to how long this car could be driven if there
are no real problem sysmptoms other than occasional check engine light - I don't have
all info. for the specific car yet, but I drove the car and did not notice any problem
or CEL, but was advised the warning did pop up at random.

See:
http://www.articlesbase.com/cars-articles/audi-a4-and-a6-torque-converter-problems-zf5hp
19fl-and-fla-transmissions-350850.html

or

http://www.upublish.info/article.php?id=124240&act=print

and

http://www.audiforums.com/forum/showthread.php?t=69877

Is there a permanent fix, uprated torque converter that is avaialble and possibly
resulting in better than original shifting performance but most importantly a unit that
will last through any potential power add mods given to the car.

Ben