URGENT!!!! Need stock xxks2 kernel

hey guys! This is really important and extremely urgent. I need the stock kernel from the stock rom s5660XXKS2 . Yesterday i downloaded an overclock kernel and applied it from the recovery utility. My android version is 2.3.5 . Now my phone doesnt go past the boot screen. Everything works fine up to boot screen. After that it hangs and doesnt go past it. I dont want to flash the whole rom again. Please please please help and reply quickly!!!!! Thanks guys.