I'm feeling your pain. I just went to a holiday party last weekend, & it required a new dress, which required new "hold me in" garments!
I found the ____@____.com't remember the name brand of the undergarment I bought, but it was a tube shape that went from just below my bra line, to below the hips. I really liked it, because instead of stopping @ my waist & pushing everything up, giving me a big belly, it evenly squashed my entire midsection & was very slimming.
Underneath that, I wore shaping pantyhose - Assets brand. Sizing was true - I didn't feel like they were too small, and the waistband didn't feel like it was cutting me in half. It gave even more definition for my hips/thighs/lower belly.
I looked like a million, & spent under $40!! Good luck. T.