what about one of these?
http://www.cutpriceracing.com.au/store/Torque-Converter-Clutch-35-Pitch-12Tooth-and-420P-10Tooth-19.05mm-3-4-bore-FREE-35-Chain-and-35-Sprocket/
oops, I now see that's what you suggested earlier. would delete that post, but I can't. oh well.