47-55.1 Mustang gas experts??? How fix this leak..... Not the O'ring

[paintman]

Hey guys! First off Merry Xmas to all of you! So I have you standard Mustang gas tank that keeps on leaking around the bung where you hook up the fuel sender wire. It is not leaking around the flange/O'ring. Is there anyway of stopping this leak without removing the entire sending unit? Or do I have to bite the bullet and remove the sending unit> If so, should I just buy a whole new sending unit or is there a way to fix this leak from the inside? I am not familiar with how this little bung is sealed off. Is there a nut and gaket of some sort on the inside? Thanx!