Kit (complete, ready to install) includes:
Max leaf size: 96" x 48 " x 2"
Click Here
and while it is intended for for the single box track I am tempted to suggest it will work (or the concept at least) for your bypass application.
Please feel free to reach out to us to discuss your application further.
How heavy do you expect the doors to be?
Please let us know if there is anything else we can help with.