Was in the same situation couple months back, was told by service mgr that it could have easily cost between US$1000 - $1500 but was fortunate to have extended warranty cover the repairs.

Alternator was replaced together with tensioner pully and alternator belt...

PM me if you need the part no.

Good luck with the repairs! Don't know how much Perf motors S'pore will charge, but keep us posted if you find a good mechanic in S'pore.