I just got the Black Goat of the Woods expansion as a present, and the herald sheet appears to be missing (I've found pictures of what it should look like via a google search).

Is there any way I can get one by e.g. contacting fantasy flight? Should I just get over it and print out the details from the web? Thanks for any advice.

Contact FF games they will send you one.

Did you remember to check under the insert? Maybe "they" hid it from you, knowing how difficult the BGotW Herald is .