The difficulty in making your own transfers will be the white - you cannot print white on clear decal paper, and if you use white decal paper you have to trim it VERY close.
What you could do is make two sheets of transfers - one which is a red circle with the white details printed on white decal paper. Cut it tight around the circle (or, perhaps better, print a larger red shape with the white details in the middle and then use a punch - you can get very fancy, specific ones from craft supply shops for scrapbooking - to cut a precise circle). Then, make a wolf's head on clear decal paper.
A bit of a faff, but the results might be spectacular.