I stumbled across the Snugpak - Jungle Blanket and my interest was piqued based on the packed dimensions (advertised by snugpak). As the winter months (read as DIY season) are gone, I was thinking this may be a quick approach for a TQ. Add a drawstring channel and either grommets or "Velcro stuff" to fashion a foot box.
I have a snugpak mummy bag I use for a TQ now...but it takes up a lot of space in the cases on my bike. Just thought I would float this out and see if anyone has any experience with the this blanket before I order one and get to modifying.