Change Product Photo

We have a new colour, Gold, for our Radiator Covers and need to create a visual representation of that colour. Enclosed is just one design of the cover in Red in situ, a cut-out, and examples of the Gold Colour ( we have 6 main designs). Can you please provide the cost for changing the colour to Gold for products in situ as well as on a cut-out so we can decide which is a better option for us? Many thanks in advance. Monika