Is anyone familiar with any other Ansi Editor that might have TDF or ATEF support?

It's an old question - but icy_draw supports TDF out of the box: https://github.com/mkrueger/icy_tools/releases/tag/0.0.1

Just open the tdf tool and drop in the .tdf or zip file into the directory. icy draw will pick it up automatically.

--- Mystic BBS v1.12 A48 (Linux/64)
* Origin: 2o fOr beeRS bbs>>>20ForBeers.com:1337 (21:2/150)