Are WA-Quantum Chips even sold anymore?

Tbg,

Acoustic Revive still has them listed on their web site: http://www.acoustic-revive.com/english/qr8/qr8_01.html

I've always purchased them from Japanese sellers online and with their North American distributor gone, there aren't too many other options at this point.

Joe_appierto, curiously I could not find this page. Thanks.

I foud a card of them for her on Ebay.

Great experience on fuses and circuit breakers, then comes those for caps, little effect on speakers. Some, e.g. for mobile phone, didnt do anything.