Bob,
I've seen them at a few places but off hand I can only recall REI selling them:
Roll-a-Table
Item 378009
This easy-to-set-up table is the core of a comfortable camp kitchen. Price: $44.95
http://www.rei.com/product/315.htm?v...HP_CAMPING_TOC
SC Aluminum Roll Top Table
Item 695759
This portable slatted aluminum table collapses for convenient transport--use it for camping, tailgating and picnics. Price: $39.95
http://www.rei.com/product/47586928....HP_CAMPING_TOC