Ugh - but yay for finding it!
For a show in a week you’re going to want to see if there’s a rental laser, or another Glowforger in your area
It’s going to take that long for support to get you the replacement part. They’ll show up here and move this to email since you’ll be discussing private info (like your address). If you want you can see if the chat window is open at support.glowforge.com to speed up the process a tiny bit, but they don’t ship from the same place as the CS folk are so a week or two isn’t uncommon.