I emailed the guy at vgrooverail.com. Here's wheat I got back. "I just have 35.5" pieces with holes pre drilled. $31 each plus $15 shipping." Pretty steep on the shipping. Grainger has 48" pieces @33.45 plus local tax. Cold rolled 52100 steel Much better deal which is surprising since Grainger is usually 3 times more expensive than anyone else. http://www.grainger.com/product/PBC-Linear-Linear-Rail-2CRV9?nls=1&searchQuery=2crv9 All this assuming that we are talking like product. That being VRD1 rail. Mark, is that what the rail here at OpenBuilds is? My thought is to use steel rail and steel wheels on the top and existing aluminum rail and Delrin wheels on the bottom. Does that sound workable?