Classic plates on SVO's

[86-TC/SVO]

As most of you know I bought a low mileage SVO. I'm trying to get a Pa Classic plate for it. I took the pictures that the DMV requires and the rest of the paperwork needed. I received everything back today and they want me to: (exact words)
- remove the rear spoilers
- if orig. provide manufact document. & paint to match
- if not orig-remove
My question is what kind of "manufact document" can I use to prove that the spoilers are factory ? I know if I send them something I will never get it back. I'm not sure if I can scan a brochure picture and use it or if I give them the SVOCA address they would take the time to find out.

I can't be the first one trying to get a Classic plate on an SVO in Pa.
Any suggestions please !