Correct. The correct steering wheel fits 1940-1947 early. They are not reproduced....but there is a steering wheel restorer in North San Diego county that does have the mold to recast your wheel. You would need to send him your core, he burns the rubber off and you get back a perfect steering wheel. Last time I spoke with him...about a month ago he was charging $750.00 plus the shipping.
Now...if you are not particular to be authentic....they the 1947-55 1st series truck wheel has the same splines and attachment. Also most of the 1949-54 Chevy car steering wheels will bolt right on. You will also find on ebay Butterfly wheels which will work.
Brian