There's another thread on that somewhere on iRV2. I think it was just that they're very busy with the shade business, and this was such a small sideline that it wasn't worth continuing to do it. I have no idea how many sets they did a year.
2008 King Aire 4562, Spartan K3(GT) w/ Cummins ISX, Motosat HD-SL5 w/ SWM-8, Multiswitch, HR34 Genie
2014 Jeep Grand Cherokee Overland 5.7L V8 Hemi w/ Blue Ox Aventa LX Tow Bar and baseplate, SMI Air Force One brake