Actually there is a lot about those cages. It depends if you call them Pro-Line cages or Constrictors NW cages in the search.
I did this writeup last year and have a new custom built cage coming this week.
Here is the link for the thread on this site.
http://ball-pythons.net/forums/showt...=proline+cages
I'd love to hear about your Mussarana as I'd considered looking into them at one point.
They sound very cool.
Also, Shann has been using these cages for a while and likes them.