Yes, seems everyone's getting either the Rizoma (and yes, PJ's seems like the best source - got VERY good service from him a few months back on one -
PJ's)
Or some people like the one from Hooligan Racing - their site seems to be down, but here's their product line:
hooligan parts
Andhedrew, you might give PJ a call - as I said, he's usually VERY good at getting back, but emails sometimes go astray. I had sent him my number, and he called back late in the evening to catch me at home.