Hard to fold up a ladder and put it in the pouch that hangs on the side of my lineman's belt. I picked up a couple of these a few years ago (they've got a GREAT price on them nowadays http://www.summitstands.com/productdetail.aspx?id=329146) and snap them on my belt and drop four or five steps in each one... carry one on my left side and one on my right. Throw a lightweight stand on my back and grab my bow, and I can walk miles into some place and be ready to climb ANY tree in a matter of minutes and be hunting.
You can order them from www.ezyclimb.com if you had to, but like I suggested to Schultzy up above, I'd suggest going to a Cabela's or Bass Pro that stocked them to save on shipping charges.
I poked around on eBay and I see Bowhunters Superstore has a box of 50 of them for $195.50 plus $10.00 shipping. http://cgi.ebay.com/Cranford-EZY-Cl...0?hash=item562c1f399f&_trksid=p3286.m20.l1116