Rick - Here's a screen shot of your part:
I'm measuring 5.00 inches between center of holes, have rounded thickness to 3/16 thick, diameter of the ends of the dog bone are 0.875, and left 0.485 across the thin part in the middle.
I did find that the original part was a bit "lazy" with the tangent blending around the periphery. I fixed that in the CAD model. You'll want to make two from the CAD model so they match.
This orignal part is carbon steel (magnetic and has rust forming). The face with the countersinks has been grained and is close to a #4 brush finish. The sides are milled (piece looks to have been bolted to a table at the ends and then milled around the outside - CNC, 3 passes). The sides are not as "clean" as the grained face.
I have already submitted an RFQ to emachineshop.com with the STEP file and your contact info, Rick. I specified qty 30, 304 stainless steel, buffed satin finish on the appearance face and sides. You should get an e-mail from them. (They didn't have an option for grained finish, buffed satin is potentially more economical.) I'll e-mail you the STEP file and you can submit an RFQ for different options / quantities if you don't like what they have to say.
Let us know how that turns out!