How do I get a Broadcom BCM430N wireless card working?

My acer computer with ubuntu12.10 can't connect the wifi. how can i do with this. i see the question at Wireless doesn't work on a Broadcom BCM4312,the first answer said i can use b43-fwcutter and firmware-b43-lpphy-installer ,but there isn't a download link at https://apps.ubuntu.com/cat/applications/b43-fwcutter/,

Neither nor firmware-b43-lpphy-installer ,who has it.how can i do.