ACID!

[wineguruchgo]

I'm going to suggest that you go in the complete opposite direction.

Gewurtztraminer from Germany

Viognier, Marsanne and Rousanne from the Rhone -blended they are wonderful.

Moschofilero from Greece

All are wonderful wines with much lower acid than Pinot Grigio and Sauvignon Blanc.

Let us know if it helps. There are over 300 grapes in the world...I'm sure we can find a few that you can tolerate!