These are the old Arii figures with new Odemars heads and a new Evergreen base in the case of the first one.
This special stall is made of old sprue. When I get long straight pieces of sprue I keep them in my spares box. Then when I have a special project that requires straight round rods of plastic, they are ready.
I used a bit of Kleenex tissue to make the sling. Drench it in superglue to stiffen the Kleenex and then it will glue to the styrene plastic sprue with regular model glue. I put a tiny drop of model glue on each horse hoof to strengthen the piece. This will serve with one of my WWII German Veterinary Units.