Good morning, one suggestion I would have is to get the part number from the Parts Manual and then search the internet for listings.
The 1969 manual can be downloaded from MyMopar
. I have not used the 1969 myself, but have found the 1970-1971 manual priceless (funny, as the PDF is free). If the 1969 does not work for you, you may want to try the 1970-1971 Polara/Monaco parts manual on the same site, as many parts from 1969 carried over to 1970. Good luck!
PS: I saw your post
in my 1970 Polara convertible's garage. Would love to see photos of your 1969!