HOW DO I GET A GOOD CATALOG FOR DAWING CONDUITS (IN 3D) 1/2" TO 4" THE STANDARD ONE IN THE AUTOCAD MEP ONLY GOES UP TO 2.5" AND IT ONLY COMES IN METRIC AND THEN IT ONLY GOES UP TO 2.5" AND THE BEND RADII ARE ALL SCREWED UP ......... ANY ONE HELP PLEASE