Hi Syd,
Not that I know of from memory it is rectangular in shape. From memory many years ago I just made one up from a bit of hardwood, bit of Flinstone style. The mate I did that one for, probably 8 years ago is still using it and has never complained about the blade brake not working. It is not too hard to get to, I stand the mowers up vertically with a chain block so things are easier to get to. I have also tipped a couple of Greenies on their side to work on them, but I think standing them vertically is the better option. Just empty the fuel tank and remove the battery before you do this.
