I should have at least one at home. I will PM you this evening.
How permanent is this use going to be? If you don't intend changing it for a long time, or could reuse the flat sides elsewhere later, it might make more economic sense to just fill in the gaps with putty and paint it brown. I used wall spackle to fill in the holes on my Snow Queen palace parts. Fill, sand, couple layers of paint and you are good.