Yep, same boat ya'll in.
I found this link here on RCU <radiosouthrc.com>
They will match paint using your sample of 2 inch Ultra coat covered wood.
I am doing a scratch built Ultimate in green and white. Tough color to match.
I called Radio South. Total cost for the white, green, primer, enough to do several planes would be about $76. This included shipping. I know that sounds steep, and it is steep, but it's only about $50 more than the rattle can paint.
hope this helps.
tonyc