Where can I get k&n filter for my gen2 in Perth?

[BUSGO]

Not really extreme, just air filter not expensive and I m getting flash ecu, might as well get it.
Y do u think it doesn't run as well with k&n compare to stock?

I just found that the bike ran quieter and smoother with the stock filter and the K&N didn't give any noticeable performance improvement for me.
The advantage is the re-usability of the K&N of course.