16v jon we make all sorts of sandwich plates, do you know what make yours is and whether it has a built in thermostat? If not you could replace yours for one which has the 2 cooler ports and an extra tapping for taking a gauge.
For anyone else, we manufacture a plate to go between the filter and block ( or water to oil cooler if you have one fitted) that will enable the fitment of 1 or 2 gauges. Make sure that you will still have sufficient room to change your filter as these asre just over 1" thick. Let me know if you have your gauges and if so what sender or probe they have and i'll sort out the rest. Alternatively we can supply mechanical oil pressure and temperature gauges in either black or white face.