Bailey bordeaux 2002

Christine D

We have the above van and in the wet room there are white circles of plastic which ( I think) cover screws inthewall.  They are  about the size of 10p or a bit bigger.  Our are broken and I want to replace them but I don't know where to get them.  I've tried
Baileys  but they don't  appear  to stock them. Does anyone know where I can get them from?