Hi Chris
Great to see these , as you say looks like both by the same sculptor , I remember the second but not the first
As for replacement pieces , you could see about a 3D version of the hat or use magisculpt or perhaps plastic card and sand into shape for the pointy bit
Not sure what the first was holding perhaps a sword
The name Jarvis or similar keeps coming to mind as well for some reason
I have sent you a profile message as well
Sorry can’t be more helpful
Happy hunting
Nap