Good source of 2.4GHz directional antenna?

[Haydn Lowe]

Hi Again,

Thanks for responses to my last message!
I'm on to my next challenge, and would love a few tips...

Does any one know a good source for highly directional antennas/dishes in 
Australia - or even better - in the A.C.T. region? I've been trying to hunt 
down galaxy dishes, but so far haven't found anything ...

I'm looking for something cheap I'd even MAKE it so long as it's simple, quick 
to build, and robust/weatherproof. BUT I'd probably prefer to buy something if 
it is reasonably priced - I'm really busy at the moment.

I'd like to build a link which could be either 2 or 6 km, I'd be happy to use 
two different types if need be. What sort of gain do you think I'd need?  16 - 
24 dbi? less? The smaller the antenna the better, but obviously beggars cant be 
choosers! - ideally I would like to be able to temporarily mount it on my car 
or a ute... (but this is something I can worry about later)

Thanks in advance
Haydn