Recently been using https://www.centrecom.com.au/ for buying a few things like Unifi WAP's and Synology kit.

Pricing seems to be good and they have some good specials

Also they have a superstore near me in Nunawading

Also had a great experience with purchasing a Hikvision NVR from https://www.securitywholesalers.com.au/

Installed the NVR and then sent an email for some support and it was expert, prompt and very helpful