Have you tried Paul C. Buff, Australia?

In an effort to keep shipping/import tax, a minimum,
would a 86 inch (7 1/2 foot), umbrella-reflector, w/diffusion cloth
work for your mobility needs, instead of a 60 inch (5 foot), octobox?
Price for the pair in the USA, $104.9f0 USD.

86 inch reflector, $79.95:

Diffusion cloth, 86 in. $24.95:

Call PCBuff Australia:
Phone# 1300 73 11 25

Just a thought,