There are conversion kits available. You don't need to find the full column, since the shaft is the same for floor and column shifters. Or any other year setup and simply keep your just only 74 parts. Just remove the collars and install the propper ones. Now I don't know what you will deal with lower bearings and shifter tube. I'm not familiar with column shifter parts.
https://www.ebay.com/itm/NEW-1971-7...8?hash=item2af3690f12:g:SrsAAOSw0vVfd6HAbut dunno if is really the full setup or will need anything else
or if you want it NOS with turning switch included ( and even the release lever lettering )
https://www.ebay.com/itm/NOS-Mopar-...5?hash=item2aca69b465:g:438AAOSwUHRcvnEy