OK. Working. Don't know what I did yesterday.
I think you can have both a couch and a bed. I have a 1966
Ambassador and I had to replace the couch/bed. The area looks like yours but the cabinets (bed frame) and shelf under the window were present.
I had a mattress custom made to fit the area for about $120. Fortunately, I had the frames for the arm rests on the ends - they were just bedraggled. So, I purchased heavy duty oil cloth (marine quality) from JoAnne's Fabrics, took the mattress, the arm rests and a heavy foam rectangle for the back rest to an Amish boat canvas upholsterer and had them upholster all of that, plus the mattress for the 2nd bed. It just wipes off - no dirt, no pet fur. The table on the end which folds up was present.
I have photos for you, if you like. I haven't figured out how to insert them.