Hi
I must admit to not having had much luck with Broadcom nics in the past - in fact with my 2 old laptops I removed the Broadcom wireless nics and replaced with the Intel equivalents .
I did, however, get a wired Broadcom BCM5787M, pci ID 14e4:1693, working at 1 point. I seem to recall trying several B57 drivers before finding a working driver which is B57.OS2 dated 30/01/2007 size 46,394bytes
Due to hard drive failures a few years back I no longer have the zip package and do not know where it came from - I think it was downloaded directly from Broadcom.
I guess I could zip up the driver and email it to you but no guarantees that it will work with your hardware.
Regards
Pete