I know how frusterating it can be with no drivers, hope this makes your day. Works with the 5100c & 5200c in Windows NT and Windows 2000. It worked for me.
The following files are found inside the driver download file.
|sloc.dll||28.7 KB||26 Jan 2000|
|copyfiles.mst||1.4 KB||13 Dec 1999|
|message.txt||807 bytes||27 Jan 2000|
|deletefiles.exe||24.6 KB||8 Feb 2000|
|Epstw2k.sys||116.0 KB||13 Dec 1999|
|displaytext.exe||24.6 KB||8 Feb 2000|
|setup.exe||24.6 KB||8 Feb 2000|
|vssver.scc||128 bytes||4 Feb 2000|