I originally picked up 6 wooden cubes from a kids playset at the goodwill store 2 weeks back. Just paint them stone, put the statues on top, done. As I completely managed to balls up painting the Space Marine statue yesterday I grabbed the blocks again and gave them some thought.
I'd previously looked at Jersey barriers from several manufacturers, but it adds up really quickly and you need a lot for a simple table, so that was out then and it is really out now.
So....why not just paint the blocks concrete, add a bent paperclip to the top for a rusted lifting ring and use these as barriers. They are big enough to hide a single (heroic) 28mm fig. Heck, I can even slap some posters on some of them to make them either 40K or general PA
Really chuffed with my simple and cheap solution.