No way to attach pdf files >100K. Most print shops can handle pdf files and they can be scaled as far as I remember.
The hard part in this getting the colours right. In the original decal the grey portion was done with a silver ink which only specialist printers can achieve.
Edit: Can see that the file has been resized on upload so resolution is not as good as it could be. If anyone wants high res version of this you can contact me.