I have a Arcteryx Alpha SL that is like that. It has a pit zip that goes to the hem on the right side. Has a little button there to close at the hem if you open the zipper all the way down. The left side also has a very generous pit zip on one side (longer than any other pit zips I have yet seen).
GTX Paclite 332gr.
But, I think they are no longer made.
Salomon has one with exactly the same set up, but in GTX Pro. It was prohibitively expensive here in Japan though so I never bought it. You could check that out, not sure but it might have been in their S-Lab range.
I was really really in love with this system for a couple of years and do wish more brands would make this option.
Since I carry a running pack now mostly, with two ‘sternum’ straps over the front, one high, one lower, I carry a normal front zip jacket now (with good pit zips on both sides). I open my front zip for extra venting and the two frontal straps keep me protected enough in those cases. In heavy rain the normal pit zips are good enough on my jacket.
But check out Salomon.