A way to obtain antlers in a winter only world

[Mentos]

Now, i decided to start a winter only world because winter is cool but i'm 70 days in and wanted to kill klaus only to realize there's no deers in the world. Since deers spawn in autumn and only grow antlers in winter, there is literally no way to get antlers if there's no autumn. The game isn't balanced around one season worlds but klaus is THE winter boss and not being able to fight him in winter only worlds is just wrong.

Maybe a way to change this would be to have 1 pack of deers spawn in autumn and another in winter, or have deerclops drop an antler. Again, pretty specific, but i feel this would be an easy change.