I've had a we accident and damaged the end of the filler neck that the cap would sit on.  

Does anyone know where i can get a neck that the vw cap fits onto?

I'm at the stage of fitting it to the centre of the tank, so a one piece neck would be ideal

Centre bonnet fill you could weld a short pipe to the tank then fit an aero filler with a 50mm pipe andconnect them with a short hose and clips.

Thanks snoopy.  That would also be an option.

I've already got a monza cap that fits round the vw neck and the vw cap fits inside the monza cap.
I know it's my own fault, but it will be annoying if I was hoping to go for this look.

I thought someone must sell the neck, but I can't seem to find it.

It was if course the cap fitting part I damaged

Somebody willhave a scrap tank to cut a good neck off as the bottoms rust out not the fillers.

That would be ideal 

You'll need the early type tank with long neck to bottom right corner as the newer ones only have a 2 inch neck.

Thanks chris.

I've posted in the wanted section.

Fingers crossed someone has one they are willing to sell