So my OTTP H/E rubbed a hole in my A/C Condenser. I am going to weld it back up to prevent it from leaking. Any idea on what I put in, or where to replace the fluid that was leaked out?

 

Fluid for what?

Are you talking about the r134a that is the refridgerent? Their is also a tad bit of oil in your ac system.
Bring it to either your dealer, a bodyshop, or some mechanical shops also will recharge

 

for the A/C condencor that sits in front of the stock h/e. It has a hissing noise and leaked out all the green fluid for it.