The Irvine ISD RV Slow Retract Shower Screen Door is an excellent replacement option for your 1963 Terry Trailer shower, especially if you need a retractable door that doesn't open outward. When ordering, round your shower opening measurements down to the nearest half-inch to ensure proper fit and installation. For your 67 ¼" height and 23 ¼" width, order a door sized 67" tall by 23" wide. This slight reduction helps the door fit within the opening without issues. Typically, no extra parts are required beyond the door itself, but ensure your current mounting area is compatible. You can order directly online, and use code ALIRVP at checkout for $5 off plus free shipping on your purchase.