Theater seating requires extra depth for the recliner function to work correctly unless it is a really high end set.
Let me see if I understand this correctly - the manufacturer offered theater seating as an option - and now says that it won't fit in the space?
Is it obstructed by slides, or what?
As far as other sofa's - I've never found a comfortable sofa bed. There is one in our current TT. It's better than the jackknife in our previous TT, but only marginally so.
That's why we have a model with two Lazy Boy recliners.
Could that be an option for you? \
Two recliners which can be turned sideways for slide/ closure clearance. Ours have to be turned sideways to bring in the opposing slides.