Spectrum analyzer waveform capture: GPIB interface card and capture freeware

I'm implementing a spectrum analyzer (HP 8562) waveform capture
system. I just need the ability to obtain a bitmap image of the
waveform. I've found free oscilloscope waveform capture programs, but
I need one for our HP spectrum analyzer. I've tracked down some
applications that will do this (VEE, labView, SPView II, GPIBLab) ,
but I'm hoping to spend less than 100 USD and the PC for this runs
Windows 95. I may be able to use source code in C or C++ if it's 80+%
complete.
- Could some kind individual point me to software/freeware that will
do this for