Style chooser

i was wandering if there's anyone of you guys in this forum is from kuching or happened to know any used parts dealer in kuching who sells or keeps mirage 4g15 1.5 complete head. My car is proton wira 1.5 manual and recently i had some problem with its head and the piston arm. So, i would like to swap the original head with mirage 4g15 head. As far as i know, mirage 4g15 is a twincam engine,so besides replacing the defective head, at the same time i also would like to upgrade its performance...