I bought mine from Rock Auto.
AUTOTECNICA DG0514087 {#4051004, DG0514087} Info
5/16" outlet w/o return. This unit has the proper ohmage of 10 empty and 80 full. $49.79
Please report back on its accuracy, I see is the correct empty/full resistance but everywhere in between empty/full? I don't think anyone manufactures one that works properly.
