I have complied a list of the bedding merchants - this list will be constantly updated.

Bedtimes Gallery
#B1-09 Park Mall
Tel: 63387889
www.napure.com.sg

Englander Gallery
#05-21/22 Plaza Singapura
Tel: 68845755
www.englander.com.sg

Lady Americana
 7500A Beach Road #01-33
Tel: 6298 0595
www.ladyamericana.com.sg/

Lotus Sleep Studio
#01-11/12/13 Park Mall
Tel: 63392268
www.lotusmattress.com

Sealy
91 Tanglin Road Tanglin Place #01-02
 Tel: 6235 3166
www.sealy.com.sg

Serta International
#05-07 Plaza Singapura
Tel: 62390070
www.serta.com

Simmons Gallery
#03-341/342 Marina Square
Tel: 63397966
www.simmons.com.sg

King Koil
6 Raffles Boulevard #03-317/318 Marina Square S(039594)
Tel: 6333 4181
www.kingkoil.com.sg

Here is a thought-provoking post on how to purchase a good mattress in hardwarezone.