Dear Internet, particularly seamstresses and people with Google-fu,

I am looking for a hooded couch sack (click on the link at the top to see it). The hood is what I’m not finding. Can anyone do any of the following?

a) find a hooded couch sack for sale
b) find a sewing pattern for a hooded couch sack
c) find a regular pattern for a couch sack that my mom could add a hood to? (she’s a reasonably decent sewer, but prefers working from patterns)

Also, if I remember my sewing right–it’s pretty easy to line a fleece couch sack for added warmth, right? I can sew a little, but not as well as my mom. So this would be something I’d ask her to make for me.

Thanks.