They still sell those type girdles/"Support garments", don't they?
Yup, at the underwear department of large stores, and in places that deal with the "more mature" woman. They're not cheap, but if you've ever sprained your ankle at the same time as you gave up smoking and you have a fitted bridesmaid's dress to fit into, they'll do wonders.

Um... so I've heard.
My Mom used to work for a military transport company back in the late 1940's & she said the only good reason to wear these was that the guys on the flights couldn't pinch her butt!
Glory be, panties that will stay up without stays. The magical things science is doing for us, I swan.
My own magic oval crotch itches just thinking about being stuck in one of those synthetic horrors all day. Ugh.