Don’t have a source for a decatted pipe, but why do you want one? It would almost certainly make your car illegal for use on UK roads (if they could meet emissions regs without them, manufacturers would) and there’s not practical reason to need one. All it will do is make your car smell worse, and throw a CEL. Instead of a decat, get a down pipe with a good high flow cat that meets emissions regs, is better for everyone.
