Hi Michael,
Just like you the new GT40 team in Cape Town had a problem sourcing this Ford Zephyr Mk 3 part.
General Manager and Chief Engineer, Robbie Senekal, has them laser cut by a supplier and has made a special tool to press the vanes downwards at an angle.
If you could let me have your postal address I'll ask Robbie to post you one.
Best wishes
Andre 40