Here are list of features:
1. rough stock size is 3.75" x 2.25" x .5"
2. 2x 6.4mm clearance holes
3. 2x M6x1 tapped hole
4. 1x M5x.8 tapped hole
5. 1x slot
6. outer profile
7. machine top and bottom surfaces.

Aybody with a small milling machine can do this. Quantity will depend on the price.