Take your time when you drill and ez out center the drill the best you can.
This way you could use a Heli coil kit if you could find one but it would cost as much as a good use part, but would get you up and running today.
Also after you drill and make sure the ez out will fit, take the ez out back out and heat out the alum slightly trying to lightly expand it so the screw comes out.
Hope this helps good luck and don't heat it up to much.