Here's what I do. Buy a piece of aluminum from your local Metal Supermarket, I went today for a 3"x20"x0.5" piece and they had an offcut piece lying around for which they charged me $15 cash. I angled my table saw blade to 30 degrees and cut on the right hand side of the blade to end up with 60 degree bevels. To prevent kickback I screwed a piece of wood on the fence to trap the piece of aluminum and fed it with a long dowel. Kinda dangerous but short of the blade shattering I can't think of anymore precautions I could take. Oh and do it outside on your driveway and wear a hoodie since the amount of metal shavings is unbelievable. I'm lucky that it is December and I can still do ATM on my snow free driveway in Toronto.
Don't forget to sand and file down the razor sharp edges and corners.