One easy way to replace these fasteners and make future breakages much more straightforward to deal with is to use 2-screw fixings. Very cheap and easily available from Woolies:

https://www.woolies-trim.co.uk/p-1618-tenax-fastener

or

https://www.woolies-trim.co.uk/p-1622-tenax-fastener if you need the platform type.

Tim H.
1986 4/4 VVTi Sport, 2002 LR Defender, 2022 Mini Cooper SE