Great to meet you!! And I love "hearing" your post in an Australian accent
As far as your maintenance, can you go back to what you ate while losing and just modify that meal plan for your maintenance plan? When I switched to maintenance, I just slowly increased my calories (about 100 per week). I basically eat the same foods - just a few more healthy calories a day. I DO have the occasional rum ball (or substitute some other treat), but it is not an everyday thing!
It is possible you might be like me - cold cereal MAKES me hungry, makes me want to eat more. As much as I love it, I just can't eat it/keep it in the house. Oatmeal doesn't have the same effect, but a bowl of something like Wheat Chex? I'm starved the rest of the day!