Guys, I desperately need your advice.

Nag overheat yung kotse ko last week and now kailangan na daw ng top overhaul dahil naghalo na yung tubig at langis. It's a Lancer 95 GLXi and the estimated cost is around Php 29.4K!

-- 5.5K labor overhaul
-- 10.4K replacement of 16 valves (*650 each manipis na daw)
-- 9K for the kit
-- 4.5 for the machine shop

Any idea how much it would cost if I just have the engine replaced? Is it easy to get the same engine to avoid additional cost? Any recommended suppliers?

Really appreciate the help. Thanks.