I have modeled a simple bench. I have used the path blend file as reference.
If you like It I can model a broken version and I can adjust the position, so the steel structure will have 2 px widh when rendered and not 3 (but I think that alpha transparency will leave this unnecessary)
There are two blend files, the second have some colors added, the colors could be CC colors that could be selected by the user. I think that the camera position is not 2:1 perfect, because I get some misplaced pixels, even on the ground tile, but this is not a problem, because the bench can be imported in a different blend file.