Yeah, those could work. They're the right scale and most of the extra head sets I'm aware of are 54mm, not 75mm like this figure.
There are some 75mm kits that come with multiple heads. If you have one of those kits that would be ideal. Or, perhaps someone who does would be willing to send you the head they didn't use. One that comes to mind is Pegaso's 75mm Teutonic Grand Master.