Hi Scott.
I got the roof rake at our local ACE hardware, although I think I saw the same make/model at ShopKo too. It has a plastic rake and lightweight aluminum pole. I was worried that it might not be beefy enough to hold up, but so far has done great. It is super light and also designed so that when you push it forward it rides across the top of the snow and when you pull, it digs in.
I also have one of the older galvanized steel ones, but was just way too heavy to do any considerable raking with, so I gave up on it for roofs and roof raking for that matter- until I got this latest plastic one. I have been using it to clean off the snow station in the AL Cam for a long time!
-John