Always liking an opportunity...
Always liking an opportunity I just typed "red fox" right into the browser and let the search engines do the work. So many "red fox" returns came I up that you could spend a few hours just browsing thru the seemingly obvious choices. The websites more than likely to have a good graphic for this application are going to be the ones who are bars, taverns, bed and breakfasts, sports teams (high school/college). Sites that require line art for logos (t-shirts-stickers-etc). I found quiet a few, too many to pull out and post here when you (Shamus) are going to be the judge of the final image. I steered clear of the "nature" sites. Most had photos of red foxes but they didn't really translate to line art well. I did get a fair education on Vulpes Vulpes however.
Bummer- on the way to work yesterday morning an 18 wheeler just ahead had what I thought was a perfect full front red fox head on the side of the cab. I suspect it was a private rig and the owners "handle" and not a truck line logo. Naturally I didn't have a camera when I needed one
Good luck in that search for the right one.
Mark