by ipnosi » January 30th, 2013, 7:36 am
It would depend on what your actually looking for. From what I understand, there are absorbent pads called sheet protectors, and then there are actual waterproof sheets.
You should be able to find sheet protectors in most drug stores in the US (CVS, Walgreens, etc). For example http://www.goodnites.com/our-products/goodnites-bedmats/ will be found in most diaper sections. There might also be larger, more absorbent ones in the adult incontinence department.
However, if you can't find what your looking for there, look into finding a surgical or medical supply store.