Rusting lower radiator pipe

I just replaced my 2001 GC oil pan gasket and while I was down under I noticed the lower radiator hard pipe is rusting (the pipe right next to the oil pan - One end looks to be connected to the water pump and the other end to a rubber hosing connected to the radiator on the bottom).
Any of you guys / gals have this problem. Wanting to take van on a long trip and wonder if it is a good idea to replace before going (don't want to be stranded in the middle of nowhere).

Anyone know how to replace?

What part number is this piece?

Thanks

I hope you find your info, I am looking for the same thing.