go to
www.danimation.com look in the forum for info look in the model coaster sections, plenty of 3d animation guy and real model builders, they can give u links, i know some but not off the top of my head, so in my bookmarks. of course there is
www.modelrollercoaster.com but his rides all look like arrow. Same with the guy who make magnum and blackwidow and icescream that inverted B&M(look like B&M) intamin would be hard. But nonworking will make it easier. Pvc is hard as hell for the rails so work with plastic rods of course, you most likly will have to go to a hardware store or even a hobby or plastic store. For all the crossties wood will work or plastic if you feel like cutting all day.