Jon Fletcher has provided a very good set of hands to be used for non-commercial free media, which can easily be retextured for a fantasy setting.
In the recent past several people have also been permitted to use the stock hands for free weapons they made, these also aren't too hard to retexture.
The "standard" fantasy hands widely used in FPSC are created by bond1 and Errant AI (you can check out these hands in the store)but I don't know if they have given permission so far to use them for a free pack.
If you are planning a commercial pack, you can of course contact any artist for a business agreement. p.e. the "London Pack" by Nbt includes weapons rigged to EAI's standard hands.
In case you find my grammar and spelling weird ---> native German speaker ^^