If you have access to the Cisco Partner E-Learning Connection you can access the SP-CCIE Lab, which basically is CCIE SP Sample Lab that was released last year. There is only one pod, so there is limited availability.
As for the SP-XR4U, this is a Cisco-only lab to aid engineers with training on IOS-XR.
lab is done with Virtual IOS XR Routers running on a Linux-based VM called EnXR.
Leon van Dongen
CCIE No. 19502