I can't recall having seen any of these 25th anniversary Joes in any store. An "Uncle Pete's" near me has some Sigma 6 stuff but I'm pretty sure they imported them privately.
I can remember having seen Joes on the shelves in the 80's (A family friend who had a son my age had them) but since then, I believe they've pretty much dried up. But I'm probably wrong about that.
I wonder why Joes never hit the heights here in Australia as they did in the US?