Don't bother trying out the major local jewellers, they sell mostly wedding bands. I did my ground work some years back when I was hunting for a casual ring for myself. Most of them are catered to ladies though.
Your only chance is through big brands like Tiffany/Bvlgari/Cartier which cost alittle more, local stores like Meyson's or HK Jeweller Luk Fook in MBS.
Last option which definitely works is going to a jeweller to custom make, but you must have an idea of what you want.