Is xrandr1.4 available in Red Hat Enterprise Linux 6?

Issue

• Need xrandr version 1.4 to support multiple GPUs with single display across multiple monitors.
• With the current version, it is not possible to use Xinerama with xrandr.
• Package libXrandr is already version 1.4, but /usr/bin/xrandr supplied from package xorg-x11-server-utils reports version 1.3.
• The requirement is to use Xrandr v1.4 with the closed-source NVIDIA driver to support a desktop spanned across the output from two NVIDIA-driven NVIDIA cards. Xrandr v1.3 is not supported by the NVIDIA driver for GPU programming.