Stacker question about loft/attic
 

I just bought a 28' stacker and need to istall a loft/attic in it. Is this something I need to buy or are they somewhat simple to build? i'm heading to Indiana to pick it up in a few days and figured since most trailers are built in the area somone might know of someone who could install one

Alot of them are built in Elkhart and Mishawaka.

Thats what i was thinking. iv called a few places and no luck