there are a few on ebay, ignoring those that just contain the needle valve and seat, but not in the a1 spec.; which is:
main = 107.5
pilot = 17.5
needle = 5CN8
... now I did spot UK seller doing these, £ 19 for one carb if memory serves me well, but cannot find it .....

hmmm .... think I've found it: http://www.nrp-carbs.co.uk/shop/index.p ... d=kawasaki z1000a1&product_id=288