Or another though, why not make some sort of puller, and get some better mechanical advantage? From examining the pictures (and take this with a grain of salt, I have never played with one of these) it appears that the stator coils are all well insulated in the gaps between the ferrite cores and will hopefully protect the coils. The magnets themselves likely can't be damaged much worse than they are. The ferrite cores that the stator is wound one are not likely to be damaged, they are just sheet metal laminations, if the varnish gets damaged, they can be re-varnished.
The only thing I am iffy about, is, is the rotor/vane permanently attached to the other end of the armature, or can it be removed as well so prevent breaking plastic/foam if it takes a lot of force to get it out.
If worse came to worse, and no one will reimburse you, and PG wont repair it, then I would personally just give it hell. It all depends on if you can justify possibly destroying $500 on the possibility that it may pay off. If you don't mind having a non working show piece, then leave it be.
Me, I would rather end up with a pile of scrap and know I did whatever I could then a nice piece to sit on the shelf. You probably should not listen to me though

I have a pile of broken shit that I decided just needed a bit more force, or a little more percussive maintenance... After all, you guys didn't dub me the "mad scientist" for nothing
Good luck brother. If I can help you with anything, just let me know. You can always ship it to me, and I can put it on the 100 ton press. I guarantee it will come apart
Later,
Jason