A block or stump for chopping wood (Weston Favell village area)

I'm seeking either a block, or a decent sized slice through a felled tree / branch, please, to use as a chopping block. Around 16" or 40cm min. diameter would be useful - something like the sample image I borrowed from the Net here. Much less would be too small.
As long as it's not too heavy to pick up, I can collect in our car.
Ideally, one with enough height to it so I don't need to bend right down each time I work on it would be kind to my back :-)
Thanks for looking, thanks for any offers.