click flooring

my wife and i are about to lay some 12-14mm flooring in our house and we are looking for the cheapest place to get them from i am not a big fan of click flooring but up against the cost of real floorboards+polishing makes them a good option.
now of course i would prefer to get them in W.A. as we are doing this in stages this first stage will be about 40sqm of course who ever i deal with i will deal in cash receipts no good to me.
and as a bi-line to that can i glue directly onto concrete slab? or do i have to lay down underlay first.

We got some clik flooring from Tony Saddlers about $17m2 with underlay 20yr guarantee, moisture resistant. I think its called Designer Flooring.