Vector files are normally used for high resolution print work to retain clean lines at both (reduction) and (enlargement) such as .ai., .eps, .svg, and .dwg to name a few.
It sounds like you may just need a composited .jpg file.
Having worked at Adobe, I think I may be able to help you out here. lol
Sent friend invite.
Message me and let me know what you have in mind, please.