Here goes, but I have to warn you, my measuring instruments aren't what I would call the highest quality so I make no claims of 100% accuracy. And as you can see, I'm not a draftsman or an engineer. If you make one based on this drawing, I'd sure like to know if it works.

All dimensions are in inches. The distance between the retaining pins(2.16") is center to center as best as I could measure.