Blender Custom Bone shapes to UE4

Hi , does anyone know how to get custom bone shapes form blender in to UE4, everything imports fine with FBX but not the custom shapes, would be good to have these availble as controls for products on the market place etc

I doubt this is how that works. Ive mentioned this on a maya thread regarding this. The .fbx format is universal and doesnt support things that are too software specific.
Despite that, bone shapes to have some sort of control rig in UE4 isnt the way its supposed to work. When you export to UE4 you ONLY export the plain skeleton and the plain skinned mesh. No custom shapes, no constraints, no custom modifiers/deformers/edits/custom-node-connections/blabla/etcetc… Just that.
Then you also animate using your animation rig and then bake the animation to your plain skeleton in blender. Thats what you export then too as .fbx animation and import it on the the skeleton asset in ue4.

cheers for the reply adeptus, just thought it would be a good option to have for new users who dont know much about rigging .