Hafele makes anything you need. At a price. But, I just wouldn't go that route. It's asking for trouble long term.

on a barn, the doors don't bypass, so i think having bypass barn doors looks 'off' anyway.

Probably need to rethink the concept. Barn doors don't by pass.

I'm looking for something similar only using french doors. This is what I have found- https://www.realslidinghardware.com/bypass-box-rail-sliding-hardware-400-lb/

I am curious - Alishaes - did you ever use the system you posted the link about (Real Sliding Door Hardware)?

Hi, I'm not sure if you will find something that will work, but here is a good site for Barn door hardware and other components that might work for your needs. Richelieu

Specifically, bypass for heavy doors