Transmission hardlines?

I found a pinhole ("fixed" with jbweld for now) in what I think is the return line for the transmission in my 2009.

I'm speaking of the hard lines coming out of the side of the AT housing.

I've never had to replace them before - are the fittings and lines a standard size and diameter? Is stainless replacement a thing? Failing that, does anyone have part numbers for the factory fittings and lines?

Thanks!

 

I’d don’t know what the fitting size it.
But here’s a DIY if you choose to go with new OE lines.
https://www.tacomaworld.com/threads/how-to-replace-rusted-transmission-cooler-lines.690165/

 

In a pinch you could always cut out the bad section of line with a tubing cutter, flare the ends of what remains, and use trans hose in between. In short, make a patch.