Thor Palazzo sofa air mattress

[Blondie]

We own a 2016 Palazzo 33.2 that came with the wrong sized air mattress.
It also doesn't have the air mattress remote controller.
We've had the unit for over a year and just discovered the air mattress issue.
The sofa measures 68" across, so we assume the correct air mattress might be 68" x 52" (or maybe 54").
Does anyone know what part number we should be looking for?
Thanks.

[Mia]

You need a three quarter mattress with pump I ordered mine from amazon https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

[edanddonna]

So does the air mattress go on a jack knive or pull out?