I'm looking for these, too!

I do like this set by @minouette :
https://www.etsy.com/listing/1621120533/jack-frost-holiday-cards-set-of-5-cards?etsrc=mastodon

I've sent solstice cards a few times! I usually wind up with New Year's instead, because I get behind 😂 But I get Christian cards from some people, which are their thing and really not mine, so I decided I would send my own in alignment with the reason for the season 😏

You can find some solstice specific cards. i send those out almost every year