There's another recent thread around here on the topic. Apparently the real problem is the repro material. One of the posters said he had an old MCO (Motor City Originals) mat that was as close as it gets, but aren't produced any more.
If that frontier is ever conquered, there's still the ink stampings on the backside.
Somewhere, maybe there's a mint Grandma-fresh Scamp that has what you need...