While waiting for extra dice to restock I looked for awhile to see if I could find something else suitable to fill in. I came across two sites selling blanks in all the right colors for Descent, but one was all out of green dice.

www.thegamestore.com/Counting_Cubes_or_Blank_Dice_s/117.htm

They have colors to match Descent dice, and are the same 16mm size. On the same page you can order blank stickers that fit the dice nicely.

For me it's a temporary solution while I wait for a reprint of the FFG dice, since I much prefer the engraved dice with rounded edges.

I apologize in advance if I'm breaking the forum rules, as I understood on reading them it was for trying to sell things yourself, and I have no affiliation with the above site. It's just a resource I came across that I felt other Descent players might find useful. If necessary please delete.