yeah I got the B1 and it is relatively small - still nice though.
But this C2 seems to be just gigantic. really cool...
got to look around I guess.. 
How about taking a 1/35 scale Char B1 and resizing the hatches, machine guns etc to 28mm? It won't be the same as the photo, but should still be an impressive size.
It's one of my future projects to take an inter-war 1/35 Russian plastic tank kit [T-26 I think, but the kit is in the loft and I can't remember the exact vehicle] and convert it into a 28mm VSF landship.