Hi Since there is a rollback upfit for the big ole truck ingame already, why not scale the bed down a bit a fit it to the H-series. Iknow theres a flatbed for it but it just isnt the same as a real towtruck. surely someone is capable of doing this. IM NOT.
There is a T series version of this. I don recall if its an official content or a mod. I think its a mod made by a banned user. Some mods are missing because of banned users. If you want, the russian site has one, they keep track of stolen mods: https://beamngdrivemods.com/beamng-gavril-t-series-rollback-flatbed-tow-truck/
^ Don't forget a ramp truck, one of those are high on my D-Series wish list. The longest official frame already in game should be long enough for these if a single cab becomes available for it.