Can't help you with spray cans, but White Ensign Models' Colourcoat line of paints has what you need colorwise. They hand-brush well when thoroughly stirred, with perhaps just a touch of thinner.
WEM is UK based
http://www.whiteensignmodels.com/acatalog/index.html?http%3A//www.whiteensignmodels.com/acatalog/catalogbody.html&CatalogBody