The Mica Rack just got launched for pre-order to ship in July. It's designed to hold a dry bag, more like a replacement for a seatpost bag rather than a different pannier holding rack. Check out Miles' review from bikepacking.com if you want to see lots of pics and thoughts.
Disclaimer: I own the v2 of this item, the creator is a good friend of mine. I used it on the baja loop as did five friends and we were all absolutely stoked on it.
by boxwagon