I got cheap (less than $100) moulded plastic(?) ebay set that clip in using the factory clips and act like a bucket to collect liquid/sand etc. They look like the very expensive ones you see being flogged about.
I didn't put too much thought into them but they have been really good.
I might be wrong.
2005 SR Hilux 1KD - SOLD
2009 BMW X5 - destroyed by a hail storm
2012 Range Rover Sport SDV6 - SOLD
2015 Ford Ranger