We ended up having the original couch recovered. After researching replacements from sofa beds to jackknife couches we found that most of them had a much higher back section which would be above the bottom of our opera windows. Although the jackknife couch is not very comfortable to sleep on we still say our coach sleeps two. Tried to find an air mattress that would fit but most full size mattresses are about 5 inches too wide and 4 inches too long. Twins sized are too small. A foam pad would help but would require a large amount of storage space when not in use. Anyone else have a solution?