Need Mattress measurements 2003 Star Craft 21rb

I would be interested in hearing what your actual quote is on those mattresses. I checked into different places to get replacements for mine. I have a never been taken camping 2013 Roo 233s and would prefer the unheated mattresses. I liked my foam popup mattress that I slept on. I looked into purchasing hybrid matresses from Surveyor and Jayco as well as having them custom built and I was quoted prices of $500 - $600 each. I am going to continue my search and may post mine online to sell or swap.