[C320-list] New Tachometer

[Walter Schaffer]

Does anyone know where I may purchase a new (replacement) tachometer gauge now that Seaward Products is gone?
I've cleaned the contacts several times on the sender (mine is from engine), and I've cleaned contacts on back of instrument.  The indicator needle still jumps around for a while and eventually will settle down. It has been erratic for the past few years, but when it does settle down I'm getting correct rpm for 2800 to 3000, etc. I've got 2 numbers off back of tach: P/N I believe is 40183, and the other number is PB27871.3.
tks
Walt Schaffer, #515, 1998, Middle River, MD