Cptcave
DUDU/Mekede does not sell a different version for Vans.
According to DUDU-Lai, All 4 cameras in the DUD 360 kit are the same camera internally and same camera lenses (just with 2 styles of external cases).
( https://forum.dudu-auto.com/d/1300-360-camera-installation-for-fiat-ducato-motorhome/12 )
Some users have bought 2 kits to install 4 of the front/back style cameras. but it is only because the round-style side cameras require user to provide a custom installation bracket in order to mount them on the vertical side of a Van or Motorhome - closer to the middle, instead of under the rear-view mirror. Either style camera will work if you can make a custom bracket OR if you will accept some distortion resulting from mounting the camera too far forward under the Mirror. ( https://t.me/duduauto/64208/189986 )
According to https://t.me/duduauto/101209/153274 , some Teyes cameras are compatible. Unfortunately, I have not found verification of what makes a camera work with DUDU7.