Gloria Vanderbilt review: Amanda jeans

I have worn Gloria Vanderbilt Amanda jeans for the last 25 years because they are the only jeans that fit me. I wore 14 for years but recently went to a 16. I am 5'10 and I always bought the long in those sizes at Kohls. For the past few years it has been getting harder and harder to find them at Kohl's, or anywhere. Now I can't find them at all, except in a few odd colors. Can anyone tell me why this is happening? When I say they are the only jeans that fit me, I am not kidding! Also they are high waisted. I can't stand the low rise. Help!