I've installed the the PS anti-glare to two units of iPhone 4 and initially there is a small bubble at the top left camera part. I thought the SP was damaged (bent) but later i used some tape to remove any dust/particles on the phone surface and the SP surface, then I try again and gently rub the corner using my nails covered by a micro-fibre cloth and then hold that area using my thumb for some time until it fits perfectly, no more bubble

You can try Harvey Norman Pavilion or Mid Valley.. i saw SGP Agro and maybe Swarovski too i think.. good luck.