Interior Trim Fixing Mystery

Hi there. I've recently purchased a 2010 110 XS Utility and have a query regarding a missing interior trim fixing. One of the large 'female mushroom' style grey fixings which hold the plastic surround in the cargo bay is missing. I've spoken to a local LR parts place but they cannot identify it!!!!! Anyone any ideas what it is / where I can order one from?
Thanks in advance.

I can't answer the question but one of the best things I've bought for the Land Rover is the official factory parts list so I can order stuff by part number. Mine only goes up to the end of the TD5 so not much use to you I'm afraid. But well worth getting one if you're intending to do a lot of your own repairs.