I am trying to find software that will allow me to connect to a
mainframe computer via dial up modem and VT100 terminal emulation and
then to repeatedly navigate through pages, perhaps by inserting a list
of stock numbers, and screen scrape data from each page into a useable
format, either a database, text file, etc.  I have authorization to
view the data but there is no mechanism for downloading it and no
changes are contemplated.  I do not need to deploy this for multiple
users, etc.
If there are no turnkey software solutions, I need to find a developer
that can program or modify software to accomplish this purpose.  I
know there are a number of software packages that can data scrape from
websites but I need to naviagte through dial up terminal emulation.

Hyperterm is built-in (or easily added) ... you can turn on logging,
but no real automation.
ZOC http://tucows.com/preview/195271
or Telix www.telix.com would be high on my get-this list.
http://www.cdrom.com/category.php%5Bid%5D286%5BSiteID%5Dsimtel.net for
add-ons, including scripting.
Or ProComm Plus