Was looking for a close matching touch up paint for the Enkei Gold as used on the RPF1s. Enkei will not sell this color to us loyal customers, it's a "secret recipe". Turns out it's a 99% match to old Subaru color from 2005.
I bought about 10 different products on line and stumbled onto a this really good match:
http://www.2-tip.com/products/2tip-1308-35681
It's crazy how much this paint shifts from yellow-gold to yellow-greenish depending on the lighting conditions. But this particular vendor's formulation of the color is really close. Their touch-up pend costs around $20 shipped dep. on which kit you buy.
Disclaimer: i do NOT work for 2-tip.com or any paint manufacturer. Use at own risk. YMMV. May cause drowsiness...