Bit late to the game on this one but I'm assembling my Maul and my local Menards didn't have the washer I was looking for, so I spent two minutes in Fusion and modeled up some washers based on the dimensions of the ones linked in this thread. I did a 1" and 7/8" version, and I'll see which one I like best. I have shared the stls here for anyone building their's in the future!
