Just reporting back.

Got it repaired in a local mall. They replaced the whole slider mechanism. The bad thing is the screw located at the top right (when looked from behind) got worn out in the process so they had to remove the screw head by drilling it out similar to sixwheeledbeast's experience here: http://talk.maemo.org/showthread.php...71#post1324171

Anyway I'm happy that it's fixed even with one headless screw stuck at the back. I paid PhP1,500.00 (US$36.48) for the parts and service VS Nokia Care's quote of PhP2,418.72 (US$58.82 at 41.12 exchrate).