I have only one shirt from TM Lewin, which was a gift from my girlfriend. The shirts tend to be pricier in S'pore (TM Lewin shirts are sold for steep discounts in London).
Given the price (and my size), I prefer having my shirts bespoken for. Fits better too, methinks.
See here --
What Are You Wearing Today - www.hardwarezone.com.sg
I think TM Lewin's ties are not too bad, and I'd wear a couple of striped ones.
As for cufflinks, you could always try silk knots for starters. They tend to be relatively inexpensive, and you can match them with your shoes, or other coloured accessories (I prefer the colours on my outfit to be harmonious).
Derail:
Here's the close-up of my custom cufflinks (Proudly made in Singapore)