It looks like the commercial EnCase Forensics supports Windows 10 to some extent since version 7.12 (they're now at 8). You might want to check it out with them.
The Moonsols Windows Memory Toolkit has an utility called "hibr2bin.exe" that is able to convert windows8 hibernation files to raw dumps, those should be similar to windows10's, so they have a good chance of working.
Additionally, I encountered this message from more than a year ago:
We've analyzed the hiberfil.sys file format of Windows 8, and will release a Decompressor a month later. Anybody who want to joint us or want to own the Decompressor may mail to us, firstname.lastname@example.org.
you might want to hit him up.