Alter Product Images (Furniture Castors)

I need a colour change on part of a product image, and manipulation of the part to make it look realistic. Approx 30 high-quality product images of furniture castors to be altered initially. Examples of how the alteration should look in terms of colour and form can be provided from older photos of the product. Ongoing photo product image manipulation work on an ad hoc basis will also be available for other products, if the project is successful. heritagecomponents