I’m not sure if this is the same exact type that AFM uses, but here’s a listing for some ‘bendy’ dynamic action figure stands:
https://www.ebay.co.uk/itm/Dynamic-Stand-For-1-6-1-9-1-12-Scale-Action-Figure-Hot-Toys-Display-Stand-Holder-/254236337085
https://www.ebay.co.uk/itm/Dynamic-Stand-For-1-6-1-9-1-12-Scale-Action-Figure-Hot-Toys-Display-Stand-Holder-/254236337085