Stuff the special drivers, file one edge off a large "small precision screwdriver" and it'll get the screws out, then just replace with regular items of appropriate thread pitch.
As for the WB disks, I reckon Xamiche's probably got you covered...but I'm in AU too, so anything he hasn't got (doesn't seem likely that he's without anything), I can try help too.
Get ready man, you are in for a wild ride...I got myself an A500 2 years ago thinking just to advance slightly over the C-64...now I own 8 Amigas, 6 of them expanded in some manner...after next week's arrivals it will be 13!
PZ.