Tacoma temp gauge for water stop working

I have a 2000 toyota tacoma and the other day noticed the temp gauge stuck on the H well checked the temp with my code checker and temp was normal so I replaced the the sensor for the temp and still the same all fuses are good and found out it's my cluster but I can't afford a new cluster so I tryed to put a after market gauge in there and well come to find out the kits you can but don't come with the size adapter I need to put it in so now I do t know what to do but I do now the size of the hole in my truck where the sensor goes is a m12-1.50 so if anybody can help me figure out how to get a aftermarket gauge to work or how to fix my stock one i would be very thankful

 

Should be able to get one from a junk yard. Or you could open up your cluster and look for where it is grounding out.

 

I did check it the other day but not gonna lie didn't have a clue what I was looking at what do I look for