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Yes you can go to OpenBuilds and download the SketchUps for the different plate sizes
Check though the actuators in the others categories here and I think you will find the plate your after is the V-Slot gantry plate.
Check though these example model downloadshttp://www.openbuilds.com/?category=other-builds-projects&id=295
V-Slot Gantry Platehttp://openbuildspartstore.com/v-slot-gantry-plate/
Hope this helps