DVD +/-RW mini disc?

Does anybody know where DVD +/-RW mini disc (1.4 GB) may be purchased in bulk? I find -R and +R mini discs at NewEgg in 25 and 50 packs, but +RW and -RW are about $4 each at NewEgg plus shipping around $5 plus or minus a few cents.

You might have luck with contacting a disc manufacturer directly.