untamed bladder,
I know how you feel. On my vacation cruise next week I will completely exhaust my very precious remaining supply of plastic-backed Tena Slip Maxis.
So far I have not found an equivalent diaper with a plastic shell. I normally use ConfiDry Dry 24/7 and the Seni Quatro. Although the Seni Quatro is breathable, it stretches and sags much less than other breathables when wet. It has a capacity of 4 liters (128 oz.), which is commendable. It has an elastic waist both front and back, internal standing leak guards, and good tapes. There is no clumping or separation of the mat from the backing. I order mine from XP Medical and recommend both the diaper and XP Medical highly.
--John