yea, i'm having a hard time finding them in one place in the USA... i dont want to pay 2-3 bucks shipping for each store i have to buy from...
In the US You can get everything you need from DigiKey. There is a $5 surcharge on orders of less then $25. In my case I exceeded $25 because I needed wire, and I snagged some DB9 connectors because I am going to do Scorpei's external serial mod as well.
You could try Jameco also, they should have everything you need too. Haven't ordered from them in a blue moon so don't remember if there is a minimum order or not.
Here is myorder from Digikey. This should be everything you need, except for solder. I went with a blue led to match the Wii. Also ordered a extras of some of the items (caps and resistors) because they are so cheap. I will find someplace else to use them eventually
1 ATMEGA8L-8PU-ND 3.66000 $3.66
1 225ME-ND 1.17000 $1.17
1 A23623-ND 3.99000 $3.99
20 220QBK-ND 0.05400 $1.08
2 604-1054-ND 0.21000 $0.42
2 ED3128-ND 1.26000 $2.52
2 478-3193-ND 0.15000 $0.30
1 160-1602-ND 0.73000 $0.73
1 K325-ND 11.17000 $11.17
1 609-1476-ND 2.76000 $2.76
1 609-1525-ND 1.56000 $1.56