Just came across this and went ahead for a refill: http://www.amazon.ca/Taiyo-Yuden-DVD-R-4-7GB-DISCS/dp/B007B884W0/
They ship by Canada Post.
What I received was NOT the one shown on the picture though.
I got white printable discs in wrap. No codes and sings whatever. The wrap was very scratched and dusty and there were many glue leftovers from previously attached tags - obviously old stock (which I was hoping for).
Serial number: GG007035
First burn from the package: Smart Burn 3.1.16, OS ON @12x: