That advertisement is of GForce Bodykits dealer. 3 distributors all over Australia.
They are cheap crappy copies that doesn't fit :-D
Usually, full set kits, front side and rear will cost no more than AUD$799 supply, fitted and painted. That deal was offered by Speed Dreamz in South Australia Adelaide, but they are so dodgy, a lot of customers have to get the police involved to get their car out :D