Believe I saw a gas powered winch pretty similar to that, made by Makita, at Heath's Hdwe, just across from their freebie, courtesy hardware store coffee give-a-way. Did you know that Makita makes a gasoline powered chainsaw in Makita blue.
....hey...if you are look'n for something to do while waiting for the next snowstorm...could be a good opportunity to go hang at the local hardware and spend an hour perusing the world of Makita with a free cup of hardware store coffee...E M Heath Hardware....Centre Harbor....very close to the shore of beauteous Lake Winnipesaukee and the winter storage of the Mount Washington
www.cruisenh.com/webcam.html