The Formosa yard built the Formosa boats, the Ta Chao yard built the CT's and Transworld Boatbuilding Inc built the Transworld 41 ketch
. All with more or less the same hull
. All slightly different on top and inside. The Transworld is a center cockpit
version. The Formosa yard also had a center cockpit
version of their boat. As far as I know, Transworld boatbuilding is the only yard where you can still order the boat, the CC version though. Link: http://www.transworldyachts.com/
click on "Sailboat to the left and you get a picture of the boat and some contact info.
Let me know how it goes, I'm wicked curious if you can still order them.
Check out the link in my signature down below for more pictures. Ours (TW 41) is a 1979.