Ipod. Actually, i cant remember the type cuz i took it to a mechanic but what happned was a kid

Question

Actually, i cant remember the type cuz i took it to a mechanic but what happned was a kid dropped my ipod in water and spent there like 3hrs and after we opened it and took some water out but taking to a mechanic after like 2/3 weeks, he made it atleast power up but later he found on of the compnets on the circuit board had rusted and tried blowing through this component and it kinda blinked for a few minutes and stopped. o it looks to be that the board got damaged and I probably need a nu one. So where can i buy it or can this be fixed? Thanks a lot