As long as you're looking at SMD stuff, look at their bug shelter. It's designed to work with the Gatewood cape, but works stand-alone too with a single pole and 0 – 4 stakes to optionally hold the corners in place on the ground plus 1 stake to hold up the pole.
I like this better than the MLD bug shelter because I can sit up comfortably in the SMD. And as I now have a Gatewood cape it's a total win.
One issue with the SMD shelter as a "bivy" however is that it doesn't have a very high bathtub floor — still, I think it's enough.
http://sixmoondesigns.com/shop/shopexd.asp?id=55