Housing + dirty bunny!

Question
I currently have three rabbits, one male and two females (all spayed/neutered) and have two in one large hagen rabbit cage and the other in a smaller homemade cage. I am interested in making a cage out of "Neat Idea Cubes" or something similar, however I'm in Calgary (Alberta, Canada) and can't seem to find them anywhere! They're quite heavy, so shipping from the US costs a fortune, any ideas?
Also, one of my rabbits, a one year old female who has just been spayed, uses her litterbox in her cage, but then takes the whole litterbox with her teeth and dumps it out everywhere! Additionally when she's out, she poops near the litterbox we have set up in the livingroom, but never in it..she'll sit in it but not poop in it! It's getting tiring picking up so much bunny poop!

Answer
You might go to this site, http://homepage.mac.com/mattocks/morfz/nic.html  The first article lists alternate locations that sell the materials, such as OfficeMax and Target.

You can clip her litterbox to the side of the cage using clips from Home Depot, or also the large clips you can buy at office supply stores.  That will keep her from tipping the box over.

Some rabbits will never be perfect in their litterbox habits.  Does she go somewhere else you could add a litterbox?  Or, any of those hand vacuums are great for picking up poop.  As long as she pees in the litterbox, the rest is a lot easier to clean.  You might read this FAQ and see if it's of any assistance, http://homepage.mac.com/mattocks/morfz/nic.html

Kim