I got mine at this site as recommended by another YTer
http://cgi.ebay.com/NEW-DYNAREX-UNDE...QQcmdZViewItem
it came to 13 cents each but they are the 23 X 24 and it has adhesive strips on 2 sides (wrong sides) so it stays in place . . .she sells 4 boxes get the 5th free which I took advantage off. I sure won't have to worry about running out as I am good for at least a year. Shipping depends on where your located so you might get it much cheaper if you are on the east coast . . I highly recommend her . . .
I don't think washabla pads will ever work for me, due to my hectic schedule . . and I kinda find it icky to throw materials soaked in pee in my washer

sorry but that's just me . . . and since I only do laundry once a week, I can only imagine how I am going to store them stinky pads

. . . . to those that do use washable pads, how do you store them temporarily while it is not being washed????