merge 2 augmented plots (venue and touring show)

Hello, would be quite useful to be able to import a augmented model as we import skp or dae, without replacing the existing aug. would make it easy to get a venue aug and put in it decor, pipes and fixtures from the aug  tour show. 

if this is undoable, would there be a chance to plane an export aug model in dae, skp or other? this would allow same final idea, to mix a stage augmented plot with any coming show.