I am looking for a sled that I can tow behind a snowmobile or 4 wheeler. Thinking that it should be no wider than 3', and no longer than 5', possibly 6'. I want it to have ski's and would like it made frmo Alumuinum. Anybody know of anything like this? I contemplated making one out of Aluminum, but woudl need to borrow an Aluminum welder that my buddy has, just wondering what others have seen or have? Thanks.