Did Kifaru stop making the KU pullouts? Those are probably my favorite product of all time, I use them for all sorts of stuff. Hopefully they haven't completely discontinued them.
As a plan B to the KU bags...and I have a few of the Kifaru variety are Ziploc bags, especially the heavier duty Freezer style. Get a box each of pint, quart, gallon and even 2-1/2 gallon sizes, they have the advantage of being clear and fairly waterproof too.