Welcome to the forum
Being in Melbourne, you have access to lots of the suppliers that carry what you need for builds here.
Maxi Ply in Lillydale has B/BB grade Birch ply. There's a couple of other carriers as well for price shopping.
Budget group in Huntingdale is the only source in Australia I can find for PL premium.
JD's Sound and Lighting sells some 15" ande drivers that will perhaps
be useable in a THT.
Let us know if you find some drivers here in Australia please...
2 x DR 250 (melded array) with March 2012 plans.
4 x 20" BP102 T39's, 2 x 28" 3012lf loaded underway.
3 x WH8 with melded array.Bunter's Audio and Lighting
"like"s would be most appreciated...