Finally got the adaptors made for the BMW angel eyes, so need to get on and fit them now!
They are spun from a flat piece of ally and made into the shape. I just need to drill holes for the adjusting spindles and trim the outer to the same shape as the old backings. The inner ones might need to have some tabs welded to them as i found it hard to get the spun to the exact size. Picture below of the mockup of the manta backing plate and the BMW plastic mounting cut and bonded together and the spun new ones and pictures of the fitting to come.