Btw, to those looking..
1156 and 7507 are equivalent except for the nubs in the bayonet base. The bulbs will not fit in each other's sockets, but you can interchange 1156 and 7507 bulbs if you file off one of the nubs.
1156 has nubs directly opposite from each other:
7507 has nubs offset at an angle:
It was mentioned earlier that one could "modify an 1156 to fit." ^that is what you need to do.