1998 wf 1.3 fuel regulator

[wfcruzr]

Hi guys and gals. I'm having trouble finding the right size fuel regulator. Most of them are all the same shape but where it fits into the fuel rail most of them are 10ml in diameter but I need one that is 15ml. Having trouble finding one, has anyone else had this issue? The silver one is the one that was sent but the dark one is the one off the car that I need.
fuel reg 2.jpg
fuel reg size.jpg