Here’s some at meritline.com. I didn’t see any 8mm,but they had 100 pks of the 14mm for $10
Excellent price,but they want $18.39 to ship ground to my realm.
Lots of others there ranging from 5mm and up.
Free shipping at supermediastore.com:
Some even use Ebay for them.
If you want some free ones and you got a local blockbuster,they throw away their original cases every week for the new tuesday releases. Dvd movies,Dvd games,even the original covers may be left in them.
Gotta go dumpster diving for those freebie cases,but lots of folks come away with 100’s a week.