You might consider
Jantzen Tailor Official Website A "Made to Measure" (semi-custom) tailor.
I have used them for 3 separate orders and have been happy with the results. But their mail-order service is a very low priority with shirts often showing up 4-5 months after order. That said, Ricky does not charge your credit card until shirts have shipped.
I understand that you will get much faster and better results if you stop by their retail store in HK. All in all, they provide a good quality shirt for the price with a wide variety of fabrics and styles to choose from.
Cheers,
D