<a href=”http://ttssh2.sourceforge.jp”>TeraTerm</a> is a very good serial port client.
Unfortunately, TeraTerm has no capability to handle this request.
There are only two possibilities — get lucky enough to find someone who has a copy or connect a terminal. The price of used terminals is low enough that it’s a very good idea to buy two to keep a spare on hand. Keep them (sell them) with the system when you let it go.