I recommend finding a good, cheap unit by checking with local salvage yards, you-pull-it or other parts recyclers local to you, not necessarily ebay. The source parts from certain models are truly mass-produced, dime-a-dozen so the spare parts should be plentiful and easy to find for cheap in good-used condition. I got a used one, so it smelled a bit weird and was pretty dirty when it arrived, but it is now clean it looks amazing and it works!