Hi Euan
ordered a new one from Ford and it won't fit, all the holes are about 1/4 inch out. the old one fits exactly inside the new one. You would think that someone had used the outer skin of an original one as a mould to make it.
After Gordy and Dave had a right good go at it, Alan rang me and we decided to put a patch in the old one.

Will get in touch in the summer for a meet, and give you a wee hurl. Not got as much ooomph as yours but pulls from really low down.

Stan