I happened to go down to town to get some electrical parts and picked up some LED and resistors.
The picture below shows what I came up with (proto-type) when I was bored :p. I will update this post on what it is and the how-to under SGD$2.50 budget each.
Update: These are actually for the gauge clusters. I wanted to replace the original bulbs with white LEDs for the JDM clusters. BUT the result was not ideal.
This is due to the LEDs arent omni directional enough even though the ones I picked were 100 degrees compared to normal LEDs at 60 degrees spread. On top of these, the numbers and needles looks faded with white lighting.
However, for those who are interested. Just let me know and I will post the steps in making the LED replacement.