You'll love the 48'' W 34'' D Rectangular Triple Shower Base at Wayfair - Great Deals on all Home Improvement products with Free Shipping on most stuff, even the big stuff.
48x34 Single/Double Threshold Shower Base Pan Center Drain - Contemporary - Shower Pans And Bases - by AAA Distributor, LLC
HYDRO SYSTEMS HPA.7536-BON RECTANGULAR 75 X 36 INCH ACRYLIC SHOWER PAN, BONE
DreamLine Unidoor-X 58 1/2 in. W x 30 3/8 in. D x 72 in. H Frameless Hinged Shower Enclosure in Chrome
Vanity Sink Base Cabinet VSB4821345 Newport LessCare 48 in. width 34.5 in. height 21 in. depth
DreamLine SlimLine 34 in. D x 48 in. W x 2 3/4 in. H Center Drain Single Threshold Shower Base in White, DLT-1134480
Hydro Systems 48 in. x 33 in. Triple Threshold Neo Shower Base in White HPA4833NW - The Home Depot
LessCare 48'' W 34'' D Rectangular Triple Shower Base
VIGO VG6053CHCL48WL ELAN E-CLASS 46.5 INCH X 81.875 INCH FRAMELESS SHOWER ENCLOSURE WITH DRAIN BASE, CHROME, LEFT BASE
SB4834 48 x 34 AcrylX Alcove Center Drain Shower Base in White
44-48 W x 76 H x 34 1/2 D Sliding Shower Enclosure ULTRA-C Matte Black –
Vinnova Spezia 48 x 76 Matte Black Rectangle Double Sliding Bypass F – US Bath Store