Hi I can help you with the truck script as I think they are the same for the Parisiennes too according to your picture but I'm finding Grande stuff is rare.
I'm lucky that my 66 was relatively complete though the interior was disassembled.

There are a couple of really rough Grandes in a boneyard in Lamont that I am planning to visit soon for the registry but I know they don't have any Grande emblems as I am looking for two myself, and I had checked  These seem to be really tough to find unbroken as they were kind of fragile to start with.

If you ever run across anybody with a big supply let me know...

I'd like to find a decent parts 66 Grande but I don't see that happening.