Rear door wheel arch trim

My Dad has got a '51 disco II, 5 door. On the passenger side rear door the trim has started to come off and it is now just hanging on by the thinner part near the sill! i cant see how it was fixed there in the first place. does anyone have a clue as to how it is held in place?? and a source of parts e.g. if its held on by trim clips?
thanks Ross

they are held on by sticky tape, i have a set of rear ones if you are interested, they are brand new.

ahh brilliant!! i will put them back on. nah sorry dont need any, just need to put these back on with sumthing other than maskingtape. cheers!! Ross