http://www.woodauto.com/vehicle.aspx
That may help... The part number for my Alt Reg. is 85561921...
As I said that is for the 02-04 Focus Zetec. If you use that website above you may find the part number you need and ask the Auto Elecy to get it for you... You really need the thing stripped to identify the reg. and hopefully match the after market one that doesn't require the ecu.