Well, you can still use the board if you don't want to just cut a hole.
It should still fit in there, you just won't be able to use the onboard LAN.
Personally, I wouldn't let something like that stop me from using the board I want...I'm sure you or somebody you know has a saw or a dremel that will do the job.
Or, just remove the whole panel like DAPUNISHER...not really a big deal.