Anyone know where to get the actual Mercury Temp guage sender online? I bought a 1987 150 V-6 which did not have a temp gauge on it. I ordered a Faria gauge "kit", which came with a "one size fits all" type sender. However the "button" fell right out of it's holder when I put it under the head bolt. I don't know how they expect the thing to stay on with the engine running. I'd like to replace it with the mercury part which installs in the socket under the two water jacket bolts. Where can I find one? I did order a water pressure gauge from the local marina, but it hasn't shown up in two weeks. I'm thinking I could do better ordering one myself. BD