Two rear right brembos
 

wondering if its possible to use two rear right side rear brembos instead of having a left due to not being able to find a left. I assume the line will need to me a few inches longer but should work in theory?? Any help would be appreciated.

This does not apply to all cars, but for this specific setup, the only problem will be bleeding, since the bleeder screws will be facing down on the left side, meaning any air bubbles will travel to the top of the caliper where you can't get them out*. You can still bleed the calipers, but it will be a LOT easier if you unbolt the caliper, put a block of something between the pads, and bleed with the bleeder valves facing up.

The line length will be the same since it uses a banjo fitting, which can be oriented in any direction.

*You can get them out with enough pressure, speed, and dumb luck, but it will not be easy.

In short, the answer is no, you can't use two right-hand calipers without creating a bunch of other problems.

Can't agree anymore.