Oh see if you can get your mits on some of this real estate for sale billboards, they are indestructible .. Bang some sticks or star pickets ( better ) into a corner of the garden,in part shade, Using the placcards,make a box,you can poke a few holes in the corner of each plackard and tie wire then together, , Have the front plackard not tied,so you can pull it up,
Thus you have cheeps and instant compost box,,, , Make sure you get your plackards at 3.49am in the morning. The real estate rats make enough as it is and have no shortage, but remember to get some spray paint to "white out" the general rubbish written on the plastic.