@Justin ********
sadly the lawyers I personally know in Thailand are corporate lawyers. Can’t help with real recommendations. But if you are curious about cell phone tower law….
But to be serious
My first thought would be to contact your lawyer (the one who wrote this for you) and ask them if they have a colleague in Thailand they would recommend. That would be the most likely option to make sure all your bases are covered. After all you don’t want it to work perfect in Thailand but not in Australia.
My second would be to ask around the expat community. Try to find someone who actually has done this and been divorced (so you know it held up) if possible.
My third would be to ask the Australian consulate.
But my guess is your lawyer in Australia can find you a lawyer via their network.