I am looking for the above. Narrow area.
No not what I Iv ever seen in 10 years but may be on the market somewhere the closest big seen is
800x1600
I do not believe a shower tray of this size can be purchased, the main problem would be the space within the shower area. It would not give enough room for a person to move comfortably.
Yes 600x1600 shower trays do exist aswell as many other sizes
Yes possible to get them but means trawling the internet