For those of you who don't want to look this up, the design for this stand is 2 concrete patio blocks with a chimney flue piece sandwhiched in between.

I saw this a while back and wanted to build it. Well, it didn't turn out as easy as I though, I found the concrete blocks and bought them. But, I don't think they make chimney flue pieces like the one in the picture anymore. Does anyone know what I could use instead?

I'm going to be using this stand with my Planar 2.