Ceramic/Steel shower tray - sources and suppliers

[Claymore2000]

So, my home was flooded last year and the insurers insisted on ripping out my bathroom.  I had a 1000x1000 mm ceramic shower tray which they broke renovating the bathroom.  I'm a large chap and so was not keen on a plastic shower tray and they assured me they would source and fit a ceramic tray.  

 

Yes they fitted a plastic tray 800x800.  I went nuts and they told me to source my own tray.

 

I cannot find an actual ceramic tray anywhere, there are lots of Stone resin showertrays but my Google-Fu is weak and I cannot find ceramic  anywhere.   I am not sure if anyone can tell me if the stoneresin trays would be an acceptable replacement or not, I might consider a Steel enamel tray as well.  

 

The shower is on the ground floor and there is a concrete slab floor, it cannot be flush mounted so needs a riser kit of some description.  Advice on a source of a shower  enclosure of the right size would be helpful also.