Hi Guys. I also purchased a cheese grater hand guard years ago, but I opted not to use it. After installation I did not like it with my Timbersmith stock, so I opted to remove it.
As for manufacturing them, I'm afraid I would not be much help. My shop is primarily CNC machining. The cheese graters are a metal fabrication piece made from sheet metal. I do not do any fabrication in my shop. I machine from billet chunks of metal. I could machine them from billet, but the cost would be far beyond what anyone would be willing to pay. It would be so labor intensive that I didn't even take the time to make myself one. I am always up for doing group buys, but sadly we have not yet expanded into fabrication. I appreciate the thought though guys. Thank you for the consideration!