tie downs
I got some little ones from ARB the other day. They are $20 for a packet of 2, and they are just cut down versions of their long track.
Because I have the nissan tub liner, it is a pain to bolt anything to the floor, but they went through ok.
You can remove the ring on it (to tie down to), so it is just the little bit of aluminium about an inch long on the floor, that I don't think will get in the way, if you aren't using it.
I tie down a small fridge (35L) and it seems to hold it ok - hasn't moved yet.