Welcome to TM Patrick
One thing to be aware of is the size of the oil pressure sender, the SPA dual gauge that Planenut suggests has a small sender and makes fitting it directly to the sandwich plate possible, I used one similar to the VDO you link to which is large and I couldn't fit it directly to the plate so had to use a remote sender mount which is just a braided line with a manifold on the end that the senders fit into. Not as neat an installation and I now may go the SPA route.
