Door card fixings

Can you get different sized ones of these? Fixings
I bought a load of new ones but, the hole and slot in them is bigger than the round plastic clips moulded in to the door.
Some of the moulded in clips were snapped and I did the drill a hole and put a small self tapper in trick. That's worked fine. The other fixings just drop off. There's either a size mismatch, or a perfect ring of plastic snapped off the white clips in the door card, leaving a smaller round button.

I've answered my own question this morning. I've found a surviving fixing and it's a lot smaller.
Here it is between two of my new ones.

For future reference
The Defender one is part number MXC1800 up to about 2002
The larger one MWC9134 fits Disco's 1 and 2, P38's, Freelanders ....