If you do some hunting around on google you can find some (not much) info on this. I don't remember why I was hunting for it, but I was. Few people have made the switch after the fact. Lippert/Happijack are supposedly very difficult to get the parts from, and if you can get them, they prefer arms and a few legs.
Happijack would the place to call about it. We ordered our trailer and did want the sofas initially, until I found out the bed system was $1300, and the sofas were another $1300 on top of that. Didn't like them that much! IIRC the guys who did manage to put it together were coming in around $2K after the fact.
2013 F350 dually
2015 Palomino Puma 351THSS Premier Edition
2015 Nights camped 15
2016 Nights camped 5