ProSpec, manufactured by Bonsal American, offers preforme...

http://www.prospec.com - ProSpec offers a full line or preformed underlayment components including shower niches for beautiful recessed shelving and shower nooks that can be installed and tiled in minutes with the same tile as the surrounding walls. Preformed shower niches are an easy way to add recessed shelving or shower nooks for holding shampoo, razors and other shower items as part of shower construction or bathroom remodeling.