it depends, most games have highly compressed audio or even removed audio and other things removed and can fit on to a 700mb cd-r.
while a few oddballs (D2 for example) are split from one disc into two and so forth with nothing ripped but can only fit on 870mb cd-r.
there might be a copy with audio the in .cdi format that could fit on a 870mb cd-r or even one with compressed and down sampled audio fro a 700mb cd-r somewhere in the web, but that's not something that can be freely shared here within respect to the rules.
if you could find all the tools you could possible build a selfbooting .cdi with audio your self given you can find the proper knowledge to do so.