AFAIK the 3T came with a tape reader and punch port, you can however get what is known as a BTR (behind the tape reader) electronic interface for hook up to a PC etc. This is one place should be able to supply
Shop Floor Automations, Inc.
5360 Jackson Drive #206
La Mesa, California 91942
(619)461-4000 Tel
(619)461-5918 Fax
(877)611-5825 Toll Free