Try Reno Art, an Aussie company - A1 size (591 x 840 x 5) is 168g, 338 gsm - yours is 473gsm
You'll just have to join it if you want 1m wings, but you can build in dihedral...
And available in NZ - Look Smart, and ?...
Crumple
For the cost of the freight I can purchase a lot more sheets locally of the board I already use. In addition I have become quite adept at removing the paper where needed and so I save 30% of the board weight for each side I remove the paper from. The size becomes important when I build larger planes as I do not like "Joined" fuselages!
In addition the foam itself, (with all of the paper removed), can almost double for DEPRON in building such planes/models.
As I use FB in multiple thicknesses from 3mm to 5.5mm the supplier mentioned does not offer an adequate range in thicknesses and so to order a single thickness from one supplier with freight added would be against my business model.
Thank you for the information but at this time the supplier is too expensive and too remote for my purposes as I get local delivery FREE!
Have fun!