Where can I find a thinkpad 390x ethernet driver for the built in port?

[donnmon]

I've got a 3com PC card with a dongle but I need the slot for something else.

 

[AntiZig]

I'm confused about what the problem is, could you provide a more detailed explanation?

as far as drivers for thinkpad try here:
http://support.lenovo.com/en_US/downloads/default.page?