Can you get a tourist visa upon arriving at Suvarnabhumi Airport before exiting immigration?

As an Aussie passport holder you can get 30 days free visa exemption when you arrive (or leave and re-enter) by air or land, extendable 1 time per entry 30 more days at any immigration office for 1900 baht, or do a relatively simple border hop for 30 more days plus again optional extension. Current restriction maximum 2x visa-exempt LAND border hops per calendar year, but by air no fixed limit. OR go to a neighbouring country (Laos, Malaysia, Cambo) and get a Tourist visa from Thai consulate, which gives a 60-day entry plus (again) optional 30-day extension. Happy New Year =)

You can apply for a Visa at the Thai Consulates or Embassies. If you like to visit Laos it will be Savannakhet or Vientenne.

Visa excempt, 30 days. Extendable one time for another 30 days.

No. It's either visa on arrival or no visa.