I could not find any specifications for the positions of the holes or the shape of the ovals.
For some reason, this took me an inordinate amount of time to draw.
I thought that I would put it out there to save other people the time and hassle of having to do this.
Step 1: Draw the File in Corel 6.1 and Then Laser Cut Them Out.
I've included the Corel Draw .CDR file and also a DXF.
I made these at TechShop.
Hope that this will save you some time on your projects.