the price depends on the extent of damage! hopefully you will get away with a clean up of the bore, a piston and rings and some gaskets,
you should really check all the componants though, i.e crank, conrod, cylinder head, valves, bore distortion, little end distortion, big end, distortion, mains distortion

And find out why the fooker melted before you blow loadsa hard earned and melt it again!!!!

PUGO