Dime city was about the only place I could find it before but they don't even carry it any longer... I'm not sure who else would have it.
Dime city now carries sparck moto harnesses and custom wiring. Great guy and business!
The owner is a member here. We both get our wire from the same supplier but it's not exact match to OEM Honda colors.
If you can even find it you better have your wallet ready, if I remember correctly it was like over .50 per foot for each color. If you're doing everything original, you'll need about 18 colors at 12' or so. If you are doing a custom build and not using all the colors you can get away with 10-12 colors at 20' (on some, shorter on others).
Shoot sparck moto or myself a PM if you need more info