If you weren't rockin' the stretch pants in the '80s, you weren't a "real" skier. I still have a pair of my old CB stretch pants. Tried to get in them for a retro day a number of years back and busted the zipper. Aging sucks. I applaud your ability to maintain the same proportions for this long!
I simply purchased the exact same pair of Roffes on ebay in a larger size! (I actually broke the zipper on my high school Roffes when I returned from college, ah the freshman 10... actually it was the sophomore 10, but who's counting.)