////Still looking. Is it usual for orchestral pieces to be available with separate parts for various musicians? For this one, I've found an orchestral score, plus separate parts for piano and the violin solo.//////

Orchestral scores for individual instruments are usually written out, either by computer or by hand, by professional 'scribes'. They charge for the service, thats why they are difficult to get hold of. Your best bet is still to cut and paste. Beware of piano/solo instrument renderings as they can be very approximate, more for the social swaree round the parlour piano, just for fun. Best of luck. T