http://aminet.net/package/comm/misc/SerServer103 has a remote console that can probably be used by telnet clients. Otherwise you could probably use the source for the shell used by AROS.
The easiest way to make it realistic would be to give it the default KS 1.3 colors of reddish orange borders on the window. The Topaz 80 (8-point) font may actually be around somewhere on the Aminet if you have a way to convert it to the format you need.