Ford do have em as i bought 20 about 3months ago

What you have done no doubt is distort the alloy housing of teh metering head by screwing the thing too tight... about 8lbft is enough due to teh o-rings. If youve distorted the metering head then youve fooked it, to be blunt....

Do you folks have any idea of the implications of turning that screw too much BTW?