These spider envelopes were a free download from the lovely "The Postman's Knock" blog as I ordered them for myself, too. If you're not already familiar, check out Lindsey Bugbee's site for some wonderful ideas and great tutorials: https://thepostmansknock.com/
I had added that information on my post, sure!
Thanks for the link.
Finally we published the envelopes at the same time! :D
It had to happen some time.