Hi Welcome to MUT! I don't believe we've met. I'm not familiar with any exfoliators for use on dry skin, but we have quite a few skincare gurus here who might be able to help!
I had an exfoliator from Decleor that was applied to dry skin and then rubbed off. Was absolutely gorgeous - left my skin so damn soft and smooth. Don't know if they still make it - i only bought it a few times.