well up yours too!
Curious way to ask for help...

I just called around some local print shops to get one done. Most original cp overlay's were screen printed on a vinyl or lexan type film, but you likely won't want to pay to have that done because of the setup charges. Inkjet prints are much more economical for one-off's, but many people feel that inkjet prints are lower quality than screen prints.
Check some local print shops for inkjet printing on adhesive backed vinyl. Around me, this typically runs around $12-$15 per square foot.