I've noticed that the splash guards inside my front wheel arches are
both missing a front fixing, and thus loose and flapping a bit. I figure
that the fixings are those plastic "push-pins" similar to those on the
inside of the boot-lid.

Can I buy these "push-pins" from Supercheap or something, like
in a pack..?? Are they generally the same for all such fixings in the
car??

there's about a dozen different types, find out which one u want, and supercrap/repco/etc should have replacements

Thanks for that.....I'll get it sussed out today..