Have been very busy so not much progress.
So I've been messing around with heatsink options and have ordered a bunch of them from pchub.com
Here are a couple of options I bought:
After much though and testing I have found the perfect solution. The IBM-Thinkpad-380Z-2635-HGA-Cooling-Fan. After some cutting and milling measuring at 8.5mm x 106.5mm x 50mm with a built-in 5v fan I present to you the smallest, thinnest and lightest heatsink for the gamecube!!
The fan takes cold air from the top and blows warm air out the side. The 5v fan also works of 3.3v (which I have it running on). I have two of them and both of them don't make that much noise. Since they are used they probably make more sound then when there new. The heatsink itself doesn't get warm at all and neither does the gamecube motherboard. I used the original pads from an original heatsink to transfer the heatfrom the chips to the new heatsink. It works perfectly. I have been playing for hours on end and it never... I repreat NEVER get's hot!! The heatsink is also super light because it's made of thin aluminium. Perfect for portables.
I have also tried small copper ram heatsinks with a thin fan but copper is just overkill for something like this. Also I needed to buy seperate parts from all over to get a complete setup. Go to
http://pchub.com/uph/laptop/88-7628-428 ... -Fan-.html" onclick="window.open(this.href);return false;? if you are interested in one. It's only $6.67 a piece. Buy more and they get cheaper!!
Here's my setup:
Many thanks to Tchay for the link to pchub.com!!