ljk346 Okay, that's the tinted one, part number 1246407-9. Tinted ones from YM 1981 on will fit.
Trouble is the spare I have only fits up to 1979 models (p/n 1203174-6). They all look similar, but who woulda thunk they're different? Not me, but the book says they are.
If nobody on here has any, Monash Prestige in Melbourne will.