| If your thermo plate search is just hanging up on the dual sensor port requirement there is room for a little fitting that mounts an aftermarket oil pressure gauge in between the stock sensor and the oil filter tree. 
[ http://www.courtesyparts.com/nismo-oil-tee-adapter-for-oil-pressure-gauge-p-228373.html ] And then on the front side of the oil filter tree (or at least on mine, can't be sure for all years) there was a hole tapped for 1/8 BSP that just had a plug in it so I added a bushing and mounted my aftermarket oil temp sensor there. Had to bend the oil return line a bit but not a lot, ended up with less bend in it than the drivers side return had stock. 
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You don't strictly need a plate with sensor mounts - 
