I'm thinking I could build an A arm to mount the half axle to then use a modified truck leaf .
The truck leaf would be main support , as for the bounce I'm thinking some good shocks should take the bounce out of it .
The though behind this is independent trailer suspension with lots of flex .
You should be able to find all the parts you need on-line , as for doing the work use one side as a guide/reference so you know it went back together the rite way .
This would be a full on expo trailer . . . . . . .
new axles w/brakes don 't know if I would go with leaf springs or airbags .
any weight that can be removed will be , I know it's a big trailer not going rock crawling with it .