Gonna answer for the rest of the Nation. No, but you can do it yourself, and we'll be waiting for pictures.
However, based on your choices, it's going to be difficult to find a JT Proflex to dye because you have to get all the parts in white. Grillz and E-Flexes are still produced in white so they would be significantly easier. But, all this work, why not buy individual parts in red, yellow, and green to build a Rasta Flex/E-Flex as opposed to dying it?