Inside this forum(ideas and suggestions) is a thread dedicated for suggestions. USE IT PLEASE! shameless half copy pasta ^
Here: https://www.beamng.com/threads/8x8-heavy-utility-truck.15808/ May need to be updated, PM the author to see if he has plans to
yea that one is but with a little modding it can be made into a commercial truck, It would be a good place to start instead of making one from scratch and off course with permission from the author. For suggestions to add it to game it would be better to post this in the vehicle suggestions area so that the Devs can see it and provide better feedback on weather to add it to the game