take exact measurements L x W of you bed/dining area, go to Dicks Sporting Goods, Academy Sports, or any outdoor/sporting goods store and buy appropriate size air mattress. they're NOT expensive. most come w/a 12V portable pump which is of course no good for inside the camper but for less than $10 you can purchase same portable pump that operates off six D cell batteries. it inflates and deflates the mattress in less than 8 minutes...oh, and it's very small when deflated.
2012 Jayco 184BH
1998 Ford F150 Supercab. Original owner
2013 HD Ultra Classic Tri Glide
Two Kayaks. Dagger for me, Old Town for Wife
Gary Fisher Mnt Bk for me, Trek for Wife
Retired U.S. Army in 1991
Life is Good!