Willie,
The nipple size is 6mm x .75, but I do not know the length, they are for sale on the
www.1960nma.org website, made by a member in Germany. Dixie has a few different ones from Ampco and the like, but without knowing the length it might be hard to get the right ones.
I looked these up before you beat me out on the bid. Glad you got her home though.