Queen rv bed

Barry, I would suggest a memory foam mattress in a regular queen size and then you could trim it with scissors on the end and sides to obtain the size you desire and that would be much less expensive than a regular mattress.

Here's what we've been using since 2012 from Sams' (also similar at Walmart)and still very comfortable for under $250. 8” Night Therapy Total Comfort Premium Memory Foam Mattress-Queen item 186150