Your original Lippert shower pan order was cancelled and refunded because the manufacturer discontinued that specific part and replaced it with a new radius style shower pan. Regarding compatibility, the radius style pan has curved edges and may not fit square or rectangular stall bases without modifications. You should verify that the new pan's dimensions and drain location match your existing stall and plumbing setup. Additionally, the curvature of the radius pan might not align perfectly with straight stall walls, potentially requiring custom adjustments. If these factors align with your setup, the radius style pan can be a suitable replacement. Otherwise, you may need to consider ordering a full shower system that matches your stall configuration.