laptop speaker parts aren't produced anymore, is there any workaround? confirmed muffled right speaker and tried linux to confirm?

Answer 1

get a dead one of same model ... speakers likely are still good

Answer 2

Your only real option with some laptops is to buy a broken one on Ebay and use it for spare parts.   Otherwise with speakers you can try removing it, compare it to the working one and try to glue anything lose back into place.  Regardless most people would just set the balance settings to the left speaker and use the laptop for for a few more years until it's time for a new one.  

Answer 3

external speakers or new laptop. or find the part somehow.