I have looked at other modified acrylic surfaces but they are not as economic as the Hydrostone was. So, I have completely changed tack and I am considering using large tiles of marble, travertine or limestone to achieve the same thing. I have found some slabs, which are 900 mm x 600 mm in size. Most of them are a minimum of 12 mm in depth. The depth is not a major issue as the tile can be supported with mdf. The important thing is that the slabs are larger than what I need and they fall comfortably into the budget. I have ordered some samples and look forward to receiving them. I see no reason, why they won't prove to be appropriate once the tiles have been appropriately sealed.