I bought a big box of empty dice cubes a while back to make some advertising cubes for street furniture. Couple of people on the main Infinity forum have done them at various points along with me. Like this but empty.
This is a link to IJW's downloadable paper inserts to make the ad-shells. http://wargamingtrader.com/infinity/adshells-pdf-1
These dice cubes only come in boxes of 25 which is far more than I need for my table, so I've got 10 for sale.
Looking for £5 (paypal) for them. Not sure about postage, If anyone is interested I can go to the post-office and check how much. I think international postage might be prohibitive though..
They can be used as little display cases for painted minis as well as the dice cube terrain, if you do want them as terrain I can include my own homemade (laser printed) inserts which are all of a sci-fi/chinese theme (I play Yu Jing!) and if you are keen to make your own I can email you the powerpoint template I used to make them, which prints at the right size.
I bought them as new, but some do have slight surface scratches and a couple have cracks in perspex in the section that slides into the black base, but this isn't visible when they are "assembled" and doesn't hinder them sliding together.
EDIT: here is a picture of 3 of my ad-cubes