I have gone a different direction for the time being:
https://www.proeagle.com/collections...el-jack-kratos
This also resolves the difficulty of lifting my van by the frame due to the ground effects kit it has on it.
I can mount a transmission jack plate to it to get the generator down off the van. It won't be stable but I can make it work for the one job.
https://www.princessauto.com/en/deta...ck/A-p8667891e