I'm looking at replacing a part on my 4x5" view camera. The part itself is seemingly simple (pic attached). It's basically a 0.5 inch alumnium rod with a 0.25 inch deep slot cut into it. The width of the slot is 0.10" inch at the top of the slot and 0.09" at the bottom.

To those who are familiar with machining- What kind of machining technique would you use to create this part? What kind of tools would be necessary to create it? Is this CNCable?