I think any time more than that quoted by Amphoran would be more a function of getting a "shipment" together than actually making the color you want.
I can't imagine any scenario that would exceed 2 months. Look at the stock pictures, you can see all kinds/colors in various states of production in the background. The pipeline appears to be populated, business appears to be brisk!! Pick a color and pull the trigger, if you are like me, you can lurk and ponder, then when I decide, I want it the same day! I think a stock unit could be to most any US destination within 1 week! The other times (6 - 9 months) that would be some other company.