Originally Posted by
RubeRad
Or you could be kinda creepy and set up a folding chair outside a Petco or something, and accost people that walk out with full buckets, asking if you can have it when it's empty
That would indeed be creepy.
Less creepy and self belittling option would be to buy a full TidyCat bucket or similar inexpensive item at retail, dump the contents in the trash, fabricate the DIY panniers and still be way ahead of the game over paying for an LBS sourced equivalent.