Here is a list of places to visit or parts to try for the financially challenged.
1. LHS Electronics Enterprise - #02-27 Sim Lim Tower
2. Del Audio - #02-32 Sim Lim Tower
3. Koba Electronics - #03-06 People's Park Centre
4. Daiso - All over the island
5. Ikea - Alexandra and Tampines
LHS is probably your best stop to start for affordable speaker cables, or wires of any sort. They also stock decent but affordable connectors like Canare, Neutrik, Marinco, MK etc.
Power Cords - Belden 19364 or 83803
Power Distributors - UK Permaplug
Speaker cables - Canare Starquad or Belden 5000 series
Interconnects - Canare Starquad or Belden 89259
Digital interconnects - Canare LV-77S, Canare L-5CFB, Belden 1694A
Del Audio stocks Mogami Neglex.
Interconnects - Mogami Neglex 2534
Koba has a dizzying array of parts (if you can find them in the very tight maze of shelves - ask them for help).
Power Distributor - Various DIY casings from China (US outlets). You can go with the supplied outlets (not the last word in quality), or replace them with Hubbell outlets of your choice.
Daiso's most popular "audiophile" tweak is their gel damping pad. This is actually intended for absorption of vibrations during earthquakes. They work quite well in damping vibrations from your speakers or audio components. The effect on sound though is a matter of taste. They also sell thin cork sheets that are useful for damping components.
Ikea is not just for buying furniture. There are lots of ideas floating on the net, like the Lack rack project, or the various chopping blocks that can be used as equipment platforms. Projects are limited only by your imagination.
Feel free to add on to this list.