Besides hammocks & bivy bags from OR, Integral Designs, ect, check out the single-person shelters from the Tarptent folks: http://www.tarptent.com/ On the site they even give you the dimensions to make (or have made) your own shelter.

IMHO the sewn-in floor Virga model would be the one to best meet your specs. You could try contacting them to see if they could make you one in OD, black, or maybe in desert or woodland camo. Dealing with a smaller company like them usually allows for easier customization than when dealing with the Big Boys. <img src="images/graemlins/wink.gif" alt="" />