Silicone Radiator hoses for slant 6

Does anyone or has anyone had any luck finding the newer type silicone radiator hoses? I don't want to use the black rubber type unless I have to. I heard there was a company that sold some that were red, blue, or yellow that could be used, but I haven't had luck finding the company that sells them for a slant 6. Those flex hoses are not a useable option if you ask me.