I'm not sure to whom you are asking about the Barnes Breakable Glass, but I ordered mine from Aldax in the land down under, 4 kg to have a huge reserve, and paid the US$$$$ to have it shipped. Conveniently, the US$ is a bit more valuable than the AU$ by a fair amount.

From what I've been reading, cooch, there are some B9C users who have had no clarity problems over three weeks of daily use. That alone is worthwhile, but they also report that each layer releases far more easily than PDMS.