|Hey Swat welcome to the forum. Who was doing the vert demo??
Plenty of info on the resources page for builds, Hops skate shop will be a good start in Sydney as he stocks a lot of slalom trucks which will be in the three to four inch hanger range which is ideal for vert, Tracker mid darts would be near perfect(IMO) and easily and cheaply available and rainskates or Powell wheels are also rad. You have a fugn rad bowl up in Newy, take advantage of it.
cheers joe (Melbourne)