It appears that the Consulate in Perth has been reopened. This is from the Thai Embassy's (in Canberra) website:
The Royal Thai Consulate in Perth has been officially opened since 15 April 2013. Visa and consular services are currently provided for foreigners and Thais. Contact details are as follows;
Royal Thai Consulate
28-42 Ventnor Avenue
West Perth WA 6005
Postal address: PO Box 848 West Perth WA 6872
Telephone: (08) 9226 2288
Fax: 08 9226 2120
Email address : thaiconsulateperth@hotmail.com
Office Hour : Monday - Thursday, 9.30 am. - 14.30 pm.