1965 Barracuda bumper jack base, spring, wing nut, etc

Hello all

I’m in need of a bumper jack base for a 65 Barracuda. It must work with the factory 13 inch wheels when used in the trunk when used to secure the spare. Other bases do not fit through the center hole of the spare tire rim. I could use a spring to secure the jack. I see aftermarket springs for sale but they are listed fo 1966 and up. I’m uncertain what the 65 Barracuda spring looks like. I’d like an original wing nut that secures the jack base to the spare as well. Lastly, the pressed wood board that covers the spare and acts as the trunk floor would be helpful.
Thanks!

Update. I would like to acquire a complete 1965 Barracuda jack assembly. I have a beautiful restored jack but I believe it’s for the 67-69 model years.