There doesn't seem to be a purchase link, or a link to the bundle I saw it was part of earlier. ><
Here's the link to the bundle: https://itch.io/b/773/santas-secret-transfic-stash
You can also read a lot of the stories from this bundle (including this story) for free here: https://www.scribblehub.com/series/231863/tg-writing-lair-secret-santa-anthology...
I think there's no way to buy it because I didn't set up a payment option, since I have no way to manage taxes stuff, I just set it to be paid so it wouldn't be weird in the paid bundle. Sorry for the confusion.