@Piney found and posted this. If you haven't seen it, this is the best deal I've seen on them since I got mine over the winter. Just picked up a backup set!
https://www.moosejaw.com/moosejaw/shop/product_Arcteryx-Kneecap_10184328_10208_10000001_-1_
https://www.moosejaw.com/moosejaw/shop/product_Arcteryx-Kneecap_10184328_10208_10000001_-1_
30% off (1) Arcteryx item use code "SUNKISSED". Free shipping over $49.
https://www.moosejaw.com/moosejaw/shop/product_Arcteryx-Kneecap_10184328_10208_10000001_-1_