Hi Top,
Check with this guy.
Thunderbird Shift Lever 55 56 57 1st Reverse s T New | eBay
He has various parts on his seller's list. He is on my favorite seller's list and I get a periodic email from his store. I have seen other standard shift stuff on there at times. Rods,etc.
Here is another on my seller's list that has misc. parts.
1955-57 | eBay
You are probably familiar with with it but if not try posting your request here also:
Classifieds
HTH
Jim
Norfolk, VA