I too have very sensitive skin, and like you, it took me a while to find a suitable product. I now use Burt's Bees Citrus Facial Scrub, and it really is brilliant. A full size tube will cost in the region of $7.50, but you may look at virtualbeautystore.com, they have a brilliant collection of products and I frequently do online shopping from there.
There are alot of dermabrasion products out there that are okay for the face. I'd stay away from St. Ives if you have sensitive skin! bellapelleskincare.com sells a walnut body polish that is all natural and very gentle. You can use it on your face AND body with really nice results.