I have discussed this with Unicomp, and they now have the tooling to make Red on white/pebble sets in their standard font. To order, I suggest filling out this form:
http://support.pckeyboard.com/index.php?a=add with priority level high, and request a full custom set of buttons such that all 1x keys are BRILLIANT WHITE with RED LEGENDS, and the modifiers are either pebble or gray (your choice!) with RED LEGENDS.
In addition, you can add an RGB kit to this order for a Red Alert set with RGB modifiers.
Keep in mind that you need to let them know explicitly what size of spacebar and bottom row modifiers you need.
The price of this set should be the same as any other custom button set they sell.
Happy shopping folks!
edit: these are dye sublimated keys, similar to the limited run geekhack.org function row sets.