Remaking with old gold

I have a client who wants a lump of gold (from her parents) used to
make a piece of jewelry. I don’t have the tools, the knowledge or
the time for refining (is this the correct term?) and making new
stock. Is there anyone who actually provides this service? And, if
so, will it cost the client the equivalent of their first born
child?

Thanks, Pegi
Pegi Pike Jewelry