That's the one. Briggs Part # 691786. I have seen them on EBay for as low as
$ 3.00 shipped. As I previously stated my son has made these, however, he had one to model it after for the critical bends and dimensions. If you decide to fabricate one, that first one will be the most challenging as you have nothing to copy. After that , they are pretty quick and easy to make.
Michael