Sorry about the crossed wire with the spacer re length instead of diameter. That bodes better for the disc alignment, but do check it anyway.
I don't know why there is a 29.5mm hole in one leg for a 25mm axle, perhaps it is for a sleeve nut? If you could post some pictures of your forks maybe someone could identify them to a model.
If you decide to go with a spacer, any half competent lathe operator should be able to make one if given the accurate sizes. Don't forget to split the spacer so the clamping action of the pinch bolts will still grip the axle.
It might help you to know that the 65mm centres, Goldline callipers were used on lots of post 1999 Ducatis and some Aprilia's too. Rebuild kits for those are available from Powerhouse, should you find the need.
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