Decorative Board catalogue request from UK

We are looking for a company to supply us with Magnesium Oxide Cement fibre board with high gloss marble designs for showers and bathrooms on the front surface .
The panels must be totally waterproof , fire proof to Class A suitable for public area`s.
So far we have been quote 1220mmx 2440mm x 4mm $7.60 per sheet.
Please let me know if this is of interest to you.