Thank you for recommending our product Hasti and your feedback PureVision H2O Services!
These door cards are designed specifically for each vehicle (i.e shape of the backing sheet is based on the plyline pattern).
We can supply for any vehicle providing we have a plyline pattern for it in our workshop (of which, we have most vehicle models).
You could indeed screw them into the existing plyline if you prefered, providing the correct fixings were used based on the weight of what was being carreied.
Do let us know if you have any further questions Darran/Richywilts.