Update: I've pulled enough fabric from my stash for 12 sets (2 envelopes' worth). I'll try to not to make more than 6 sets identical for easier swapping.
In the event of duplicates, that's A-OK with me. You know me. I always love duplicates!
I'll iron, cut, and put the sets together when DH and I get back from our little "mountain escape" early next week.