I also can't find anywhere that sells the Krylon Fusion Textured Shimmer #2521 or 2522. I fear it may have been discontinued.
Google is your friend. Just type Krylon 2521. 3 or 4 places selling it online...
Here is the page right off of Krylon's site. They only make the nickle shimmer #2338 now. If you can find it on a Google search please enlighten me because every link that "says" they have it diverts you to a different color, not the 2521.
http://www.krylon.com/products/fusion-for-plastic-metallic-shimmer/Message that I just got from Krylon customer support:
Hello,
Thank you for contacting Krylon. We appreciate your inquiry.
Unfortunately that particular product has been discontinued. I apologize for an inconvenience, please let me know if you have any further questions or concerns.
Regards,
Lynn
Krylon Product Support