Contact The Spare Place or Turin imports here in Adelaide and they will ship one to you for a fraction of the price straight away.
Centrebores are smaller from 164 onwards.G'day Brian. How's it going? You can use the ryco Z168 fuel filter, and the Z89A oil filter. Shouldn't be more than $40 combined and most stores will keep them in stock, eg. Autobarn, Repco, Supercheap. These sorts of stores should stock plugs and can probably get rotor, cap, leads etc within 1-2days. As for the air filter, I got a K&N reusable filter which will last forever. They're pricy, about $150. Part# KN 33-2545. For the rest, I recommend Turin as well. All 5 stud Alfa wheels will fit except those off the Alfa 166 (5X108??)