Have separate cover image for display

[#1]

Due to a problem I have with the print out and what you see on sites and the fact Lulu only uses what the cover has, could there be a separate upload for a cover, likely a lower resolution version (i.e. 300x500 max), that is used for display purposes only?

This is the original, true original color version (~338 KB).

This is Lulu's version.  It's okay but a bit bright.

This is the version as seen on Barnes & Noble.  It's washed out and bad-looking.

If I use the true color version (the top one), the print out comes out too dark (2/3 as bright) with reduced contrast but the images as displayed on Lulu and other sites are otherwise correct.  If I use the brightened version, the print out comes out right, but the image as displayed comes out washed out.  Would it be possible to have a separate uploaded cover image for displaying purposes instead of referencing that used for the cover?