i have ben planing on doing something close to this for ages i think it is time i got to it!
I pointed this out to my friend, and he's already planning on making his own setup. Granted, it won't be nearly as pretty as these, but it won't cost us several hundred dollars to make a 4x4 table setup with it.
I'm thinking of casting my own corridor walls and using the rules. Forgeworlds is pretty pricey.
The rules for Zone Mortalis are interesting and easily adaptable for use with Space Crusade board sections/Space Hulk sections...
ToV
There is an old D&D game board similar to this. It is a metal base printed in 1 inch squares to resemble a dungeon floor. The walls are plastic made to look like brick with magnets on the base. The base is similiar in size to a chess board. It also came with archways.
Sad to say I lost the board but I still have most of the archways and wall pieces. It woul be easy to replicate the wall pieces.