There are two bolt and three bolt ones (plus a plethora of hi gear/hi torque ones).
FInd out which type you have and then a quick google will bring a number of options. I think I got my last one from eBay.
"Y mae dafad ddu ym mhob praidd"
1972 4/4, 1981 MGBGT, 1984 FLHT1340, 1980 XLH1000, 1990 ZX10
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