Z Flashing Kit Fits All 66" W x 42" D Shower Base Models $52.65 B004PZY962
Redi Niche single Recessed Shower Shelf – Black, One Inner Shelf, 16-Inch Width x 20-Inch Height x 4-Inch Depth $41.90 B004Q0I8U4
Redi Niche Double Recessed Shower Shelf – Black, Two Inner Shelves with Divider, 16-Inch Width x 20-Inch Height x 4-Inch Depth $47.76 B005HG7ED8