There are a couple of points I'd like to mention here.
Firstly - magnet choice:
A8 is a really powerful magnet. Its like a ceramic (which is used in pickups for the metal genre) but with slightly more pleasing highs. Its not the first option I'd choose for an antiquity - you've spent the money to get full-on vintage construction, and to 'smother' it with an A8 seems a waste. I have Ant's too and they are quite different in tone from neck to bridge but I think a small change is all that is necessary:
-the Ant has a weakened A2 magnet. You could try a fully charged and/or roughcast A2 which will push the mids more and drive harder but still keep the nice tone.
An A4 or unoriented A5 will have more strength but keep the mids there (there are many articles that suggest PAF's often came with A4's in the first place).
Secondly - availability:
Addiction FX on ebay is the best place to pick up magnets. They are available at all times and you can choose what you want. Also I'd suggest getting a bundle of different types, as taking a gamble on 1 magnet being the perfect tone sight unseen (unheard??) is a big risk. Shipping to Aus is minimum $10 regardless of size, so its better economically speaking to get a few options for only a couple of $ more in freight.