Perhaps for colors you could do a pre-order type deal or interest check, where they only get ordered if you have enough pre-sales. Along these lines perhaps a more visible campain could help raise funds - e.g. kickstarter, indie go-go.
I agree colors would be AWESOME though.
(also pcefx forum stamped ones, lol) Those slim colored cd cases sell like hot cakes.
Also Just my thought: I work with a company that makes custom plastic items for us, So my question is, when you say thousands do you mean like 1-3 thousand or more like 15 thousand? Becuase sometimes to get a break they won't really budge till 10 thousand. Just thinking if the average person on the forum get around 10 - 20 and 100 - 200 people order here than you only have a few to left to sell out of color if runs are smaller. But if you need to get tens of thousands, I'm not sure there would ever be enough sales, and you might have to sit on them a while.