Sounds like a VERY specific piece of equipment. If thats the case, I don't see them being cheap since they would be very few made.
What is the platform now? Stand alone, Notebook PCMCIA card?
I know vxutil has various pings, ping sweep, trace route, port scan, DNS Audit, finger, get html, Host lookup, host quote, get realtime, whois, a password function (dont wanna get into that) and an IP calc.
Theres more at
www.cam.com