I'm looking for a particular sort of compost bin, but no luck so far. I think it used to be quite popular 20y or so ago, before the plastic upside-down dustbin style became available. It's built by sliding slabs together, side by side, and curving them round to form a cylinder, the last slab linking back to the first. The slabs have aeration holes in them (top, middle and bottom, IIRC) and a lid goes over the top. You add stuff from the top as normal, by lifting on of the flaps on the lid, and when you want to use the compost you just slide one or two of the slabs upwards to dig some out from the bottom.
Has anyone seen something like this?