Apple Watch Link Bracelet Spring replacement

Took my link bracelet off and this small part went "boing". Now it will not re-attach like it's supposed to. It's on the "link" that is attached to the butterfly closure, so replacing it with another free link isn't going to do the trick.

Do I need to take this to a jeweler or a watch repair shop or something?

Does Apple sell replacement springs or a guide/tool to insert this very small part back into the link?