Looking for help from the pros here! Maintainer truck?

[Utility]

I am looking to find a way to recreate a maintainer truck. Looking for a body that is pre made or a RTR truck. I have looked all over the internet and have come up empty handed. I figured you all would know the options out there. Any guidance would be helpful. I am including a link to the picture of the vehicle I am trying to find. Thanks all.

https://www.knapheide.com/kuv-bodies-c3
https://i.ytimg.com/vi/vr7iCR_721g/maxresdefault.jpg