I spotted this over on 'facebook'.. now why didn't I think of this?
All you need is a simple 5gal bucket,,, a 'foam noodle' from the Dollar store... bailing wire, drill a couple of holes for the T.P. and wire... line the bucket with 2 potty bags and secure with the noodle!
I have the bucket, wire T.P. and bags... just need to buy the noodle the next time I am at the Dollar store!