I have Netscape for the mac available on a high density 3.5
that you can copy.
I will soon have the same available for IBM. I have the netscape
file, some Windows "trickery" is necessary first, to make it run.
A friend of mine at Math Comp Sci will speak with one of Comp
Instructors about making it a class project to strip down
Windows to something that will only run Netscape, and that will
fit on a 3.5. Once this is prepared, you can take a 3.5 with
Netscape and the "Netscape Windows" and put it in any IBM computer,
and it will run IBM Netscape for you. I hope this works :)