Can I suggest that if anyone is after ball bearings or bushes that they have a look at model engineering suppliers rather than "model shops". Over on the sister website to this for "Model Engineering", (you can get to it by clicking on the link in the footer on this page), you'll find a number of model engineering suppliers adverts. One that is particularly recommended for bearing is Arc Euro Trade in Leicester., (no connection except as a very satisfied customer). The proprietor of Arc Euro – Ketan Swali – has a background in the bearing business and can often recommend alternatives or source odd bearings if they are not in his normal range. Arc Euro have that size of bearing listed at quite a bit less than 10euro.
Keith