There is a CompUSA in Honolulu, 600-block of Ala Moana Blvd. They have 50-packs of 8x TDK on sale for $19.99 this week, until Saturday. There is another CompUSA in Waipahu, if you happen to be there.
Look for "Made in Japan" above the barcode of -R spindles to make sure you get TY discs. TY spindles are also easy to recognize by their shape. Don't bother with +R, they are almost guaranteed to be CMC-made.
TDK-branded TY 50-disc spindles will be of the same shape as in Japan but packaged differently.