Dennis, you can get a new one from TCM Continental, or from an engine shop. I got mine from Don Swords. Other options include eBay, El Reno Aviation, Fresno Airparts or any major engine parts supplier. Once you get it; you'll have to stamp all the information since they come blank. You can do it yourself or have a Trophy shop do it for a clean look.
That’s if you want to replace your old worn out data plate. If you
need a data plate, because you built up a motor from parts; then check around the local aircraft scrap yards. They never throw away a data plate! You have to have some documentation of a serial number for that motor, and the only way to do that is find, buy, or borrow an existing data plate and attach it to the new motor.
The principal works the same for airplanes: If I build a Champ from spare parts, exact to original specs, it can become a certified Aeronca Champ if I have an old set of paperwork and data plate from a destroyed airplane.
The FAA wants traceability, even if it leads them into the corner.
Old and new...
