I jus got a bog standard one from my local iny parts supplier for 17 quid and its absolute fine and made a big difference as the one that was on there was fooked.
Bein a standard part it wasnt painted in LOOK AT ME yella either which was good
I fitted a ****part supergaz (only cos they wuz on special offer for £2 more than a standard one) and I hate to say it but it is the dogs danglies. I noticed the difference immediately. I did need to do a bit of grinding to get it to fit though.