Fordham Bifold Shower Door Parts for Repair Drainage and wastage systems and plumbing help, advice and answers

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first time of doing this , so i hope i get it right , i am carrying out a repair job on a customers shower cubicle and it is a fordham bifold , the customer says that they are no longer trading so any info on parts would be great , in particular it is a square plastic block that the door mounts and pivots on.