I can't figure out where to ask this exactly, but I finally decided to go ahead and try to cure my 2012 zombie strain, only to realize that the potion brewing doesn't seem to be available now that louis l'amour has a shop for the candy hearts. Is this an oversight? Am I missing the link to create the cure potion?

It's not an oversight, Louis L'amour's shop is now an event shop, the potion isn't able to be made any longer.

You can buy the in user shops, though.

As mentioned, this is not a bug. I'm going to go ahead and lock it up. :)