Where can i get old school thrush muffler decals

Anyone know where I can get some of the old school thrush muffler decals. The ones that had just the woodpecker head. I have the new ones but they are a large decal. Not as cool as the old ones. I remember back when I was a kid in the 70's I used to see thjose decals in the rear quarter windows on a lot of hot rods.