Gas Leak / Sending Unit ?

I have a gas leak n my 1996 z34.
I got a new tank coming as it appears gas was leaking from the seam.
After a fillup today (1/2 tank) and short ride home i took a look and the
top /side of the tank was soaked.

sound like a sending unit lleaking too? Where do i get one ??
autozone / Parts America dont list them
Like to have one when i drop the tank if needed...