Thanks! And yes, it is probably easier to keep it seperate from the WS.
I'm running MP3Tag for Mac, so accessing and sharing individual action files isn't very simple, but here is a JSON export of these two actions:
Bandcamp URL Actions.txt (1.1 KB)
You'll need to rename the extension back to .json from .txt. All these do is a simple 'format tag field' action that performs the regex listed above on 'WWW' and 'WWW Track' respectively.