FICHT M/N in my avator.

I have a dash temp gauge for block temperature. A single wire goes to a brass sender screwed into the block on the top left (facing rear of engine).

I am repowering with ETEC and i don't think the new engine will come with the sender. It is a nice thing to have just to see what changes in temp are happening, even if the actual temp is not that accurate.

So anyone know if these are available? If so from where?
Thread size, length? Are they standard?

Any info would help.