Hi, there! The coupons are within your file downloads here! (They’ve been out for 42 days now!). The last three “files” are actually external links that will lead you straight to Lulu.
Sorry for the confusion, I mentioned the instructions on the last update but I know those emails are easily missed :)
Let me know if that works for you! I’m excited to see it on the Dungeon Dive (long time fan).