I was thinking $10.00 shipped with a no questions asked semi lifetime guarantee (IE as long as I have the ability to make a replacement)
The current material I'm making them out of is a semi flexible material. I will put on on my Dart and see how it holds up. I sprayed one with some Flex seal like paint to give it a rubbery feel. I have a rubbery material but it is hard to print, but I will be trying that too, detail is lost so no logos on the rubbery material at this time.
If you want something like GT, GTS, S, a year number like 67 or other relatively simple (non trade mark logo) engraved on the part that would be fine. Maybe a silhouette of your car?
As for logos, I would not feel comfortable putting any of those on the part at this time. I need to research fair use more, but so far it seems trademarks are protected forever. I will send a letter to Stellantis asking for permission to use the various marks to adorn the part. We will see what happens there. If anyone has an inside track to the powerful at Stellantis or maybe Mark Warman (he seems to have an inside track) or a aftermarket manufacturer with those permissions send me a PM.
BTW if anyone has a non reproduced small parts, I would be happy to help reverse engineer them, preferably from a good sample. I will give you free printed parts or the CAD file you can have printed or machined. I keep the design and will sell the parts from that design down the road. The RE and Free parts are all on my dime.