I didn't find a roof rake. What I did find was a sixteen foot long telescoping aluminum pole designed for removing cobwebs and washing windows. I bought the accessories for doing both, as we've been in this house for twelve years and there are a few windows that just need to be cleaned and can't possibly be reached. I also bought what was intended as a flow-through deck brush that I determined weighed a fair amount and could be screwed into the end of the pole.
I have now removed a good bit of snow from the front edge of the roof. This may be enough to allow the sun to take care of the problem. We'll see.