Ye they're quite hard to find in Aus. One of my favourite fractional gold coins too. Nice little stack, that 5x50 pesos and about 20x20 Pesos?
If you likes pesos, When i will travel to mexico will buy a few and will make a fair trade for australian gold only with know forum members. ;-) Ps: i have a few argentinian gold coins but all have high premium over spot.here we not have bullion coins