you may have left your run too late for this year, but don't let that stop you.
Do up your plans for what you want to see your display next year, and then work at doing a few bits of it this year.
Darylc on this forum, may still have some Falcon F16v3 controllers still available, and they are the ones that I use, but you don't have to use them if you don't want to.
Nothing wrong with a small display this year, because next year you can build up on that. I'm assuming you still have some bigw/bunnings lights from last year ? .. don't throw them away just yet, as they'll help fill out your display this year.
Welcome to ACL. You may be limited in what you can achieve at this stage of the year but not impossible to get some type of display going. May come down to how quickly you can obtain the parts you need if being ordered from overseas.
This video may offer some tips and insights: