So...I got in touch with Mechatron, they have a large selection of quality spindles. The one I was interested in, with ATC function + SK40, was quoted 7400 Euro ex VAT!
This didn't include an encoder either, which would have had to be a custom product.

So it is back to the drawing board, any other suggestions?
Maybe I need to start entertaining the idea of Asia sourced spindles, anyone have a tried and trusted supplier?

Thanks