Correct size sandwich plate for a 2003 1 liter micra

[Micra Anthony]

Hi all,
Would anyone know the correct size sandwich plate for a 2003 1 liter micra. I want to set up oil temp and pressure gauges.
Also if you know where i can get a good quality one that would be awesome. I have seen them on Mishimoto so far and Nengun.

Thank you