>> So that I can work without having to blast music through $300 noise-canceling headphones (which itself impairs focus, but is the lesser of all evils)?

Rather than listening to music, you can listen to brainwave entrainment audio (Neuro-Programmer 3 is a good program to generate these). The lack of words prevents distraction, and the audio can entrain your brain to whatever frequency is best for what you are doing (focus, brainstorming, etc). There are videos on YouTube that show EEG readings changing to match the frequency of the audio.

Also, Cerebrolysin or Fasoracetam + Coluracetam (especially when combined with exercise and keeping the body in ketosis) are much more likely to be effective than Piracetam.