Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:1593846.

This is the Mustang pony emblem scanned and cleaned up with Fusion360 for 3D Printing. The printed size is very close to the original emblem on the Ford Mustangs from the 1960's.

From the pictures above, the large emblem is at 100% and the smaller one is at 50%. I printed these examples at .2 mm.

Update: I've uploaded a vertical version of the emblem. Please print with Brim and Supports. The result is much better than laying flat.