What do you need it for? You can change your current MAC (
ip link set dev ... address
, or using ifconfig and "hw ether" parameter). You can add it to the commands executed on each boot by patching beginning of /etc/event.d/network.. (I am no Ubuntu user, so no eact name) or maybe end of udev job. That will not permanently store new MAC onto card, but it will change effective MAC on each power on, and it will persist until power down.