Found the driver in the italian site of 3.Com if you are looking for other language drivers, try europe.3com.com/ then select your country / language. In the italian site there is another driver, updated to V.90 standard, but I don't know if it works with 33.6 PC Card Winmodem... If you'd like to try, then e-mail me at email@example.com.
The following files are found inside the driver download file.
|modem/WMMODEM.INF||46.7 KB||25 Mar 1997|
|modem/WINMODEM.38_||230.0 KB||10 Apr 1997|
|modem/WINMODEM.DR_||9.7 KB||25 Mar 1997|
|modem/WINMODEM.CP_||40.8 KB||4 Apr 1997|
|modem/CTL3DV2.DLL||21.6 KB||25 Mar 1997|
|modem/WMWAVE.INF||1.1 KB||2 Apr 1997|
|modem/winmodem.inf||2.3 KB||4 Apr 1997|
|modem/WINMODEM.EX_||27.3 KB||25 Mar 1997|
|modem/WINMODEM.VX_||317.1 KB||6 May 1997|
|modem/WMPORT.INF||3.2 KB||1 Apr 1997|
|modem/WMPASS.DL_||32.2 KB||25 Mar 1997|
|modem/WMDIAG.EXE||85.9 KB||25 Mar 1997|