I run into stable lift in some camper research and they are not cheap.
Beside 400 lb
Anyway, for time being I ended up with 2 of high-end campers and can compare how different manufacturers approach the projects who don't have much margin for changes.
First thing I noticed one of the camper had front jacks brackets bend.
Closer look shows that dually brackets extenders come in 2 varieties, even they look the same at first look.
The difference is that one has locking rings only on top, the other on top and bottom.
Again, the difference that average RV owner will not even notice, makes heck of the difference in camper stability.
Meaning probably in lot of cases replacing the single locks extenders with dual lock extenders might be all the owner needs.
Brackets cost - about $200 new.