Australia:

Agencies:

AVA Model Management, Double Bay, Web: http://www.AVAModels.com.Au This seems to be a small agency with model boards, did not see any model Instagram pages. 
Chic Management, Brisbane & Woollahra, Web: www.ChicManagement.com.AU The company represents Bloggers, Influncers, Models, Talent, some models with Instagram pages.
Five Twenty Model Management, Sydney, Web: www.FiveTwentyMgt.com Model boards with Editorial/Fashion/Fitness type models, with Instagram pages, looks like a good agency with international models.
PriModels, Melbourne,
Web: http://www.PriModels.com, only a company Instagram page and other social media links, the company seems to have Fluencers as models did not see any model Instagram pages. 

Magazines:

DNA Magazine Australia, Web: www.DNAMagazine.com.AU The magazine has new covers on the website, plus has the Photographer & Model, with instagram pages! Site has instagram page too; Lots of men in underwear and tight fitting clothes.
FHM Magazine, Web: http://www.FHM.com A magazine for men with woman, covers on site, entertanment, glamour models, both models and photographers have instagram, pages listed.
Maxim Australia, Web: http://www.Maxim.com.AU Ultra Luxury, Glamorous models, Covers on the magazine, with an Instagram page.
Mens Fitness Magazine Australia, Web: http://www.MensFitnessMagazine.com.Au The magazine has new covers on their site and has Instagram page. fitness articles, famous models sometimes and fitness models too.
Smith Journal Magazine, Web: http://www.SmithJournal.com.AU The Journal just seems to do pictorials and stories on real things, did not see any commercial modeling. Has Instagram page and covers on the site.