Sooooo, there are probably a million of these out there, but I needed a better saw stop for a project I was doing and I could have made one, but I wanted an external reference for the angle for consistency and accuracy and it was easier to model one up and print it in here than anything else.  

Basically it is a standard 60 degree angle with a flat clamping plane for clamping it in my 12" Makita chop saw.  Worked good for my purposes, hopefully someone else finds it useful as well.

Piece is about 100mm x 100mm on the two perpendicular edges.