Hey, welcome to the forums. Glad that you were able to hook up with us in game and that you had fun pvping under the guild tags. Its also good that you're eager to join KGB proper, but I can't stress enough how important it is to get to know the people you want to game with and, more importantly, to let them get to know you. Keep hanging out with us in vent and joining in on group pve and pvp and everyone can get to know you and vice versa. Finding a sponsor at that point will require no further effort on your part, as someone will likely volunteer without you even having to ask.

This is assuming of course that noone steps up and sponsors you right away from the time you spent with the guild earlier =)
If/when that happens, best of luck on your app!