Quoted from JDubbbs:I plan on making an order to get a second one for a spare. Ill let you know when it arrives.
I also noticed that my drawing is out of spec, but the idea should come across. The mounting screws are wrong in the drawing, they should be higher.
I bought an extra from Trent, it was not cheap though $100. We make molds at my work, and it was suggested by one of the guys that we make a silicone mold of my extra, but Its not as though I will be able to sell them, so I decided against it.