Aluminum is fine, but foil that's only a couple hundred microns thick will only provide useful shielding above say 100 kHz. Fine for microwave shielding, but au

Aluminum is fine, but foil that's only a couple hundred microns thick will only provide useful shielding above say 100 kHz. Fine for microwave shielding, but audio frequency EM waves will go right through it. Also aluminum foil is a pain to work with in many ways. Can you buy a cheap premade aluminum enclosure that's as thick as the copper mesh you have now? Examples: https://www.google.com/search?q=aluminum+enclosure+electronics&rlz=1C1ASUT_enUS628US628&espv=2&biw=1292&bih=943&source=lnms&tbm=isch&sa=X&ei=vJNwVcGXLoOCsAXwtIOoAw&ved=0CAcQ_AUoAg&dpr=1 https://www.google.com/search?q=aluminum+enclosure+electroni... Then you ground the box same as your mesh is grounded now.