I made a loaf box, inspired by the one on Passfire.
It consist of a box, roughly 80x120x100mm, and is smaller at the bottom in order to get the star loaf out.
Also a rammer with a handle from an awl and a block of wood filled with lead in each side to make it heavier (I covered the lead with some white coloured filler).
I havn't tried it out yet, though. But I think it will work just fine, even though the scrap wood I used is crooked by being in the humid garage
It was treated with some kitchen table oil so the wood won't get ruined.
Here are some pics, with some recycled kraft on the walls of the box in order of easy removal of the star loaf.