I’m not sure what country you’re in, but have you tried Amazon? I found Verbatim 50 packs of 25GB for $40 and Ridata (usually good quality discs) for $28. If you want small amounts there’s various 5 packs for less than $10.

About the standing thing: the beauty is the current Supreme Court has eliminated that as a real requirement, so you can just have someone sue for theoretical harm and be all good.