hello, i am putting a mechanical temp gauge in the car and i lost the adapter fitting that has the tapered inside edge that the thermocouple seals against. it's the one that screws into the intake and then the thermocouple sits in that and then you tighten another fitting to hold the thermocouple against the tapered fitting tight. have i confused anybody yet. my question is, can i go to the auto store or hardware store and just pick up this fitting or is it only going to be in the gauge set. i can't take this gauge back, i got it from ebay a couple years ago. it is a mallory gauge.