looking for a quality BNC female to RCA male adaptor

I have a BNC to BNC coax.  I want to use it with a piece that only accepts RCA termination.  Does anyone out there know of a "high quality" BNC female to RCA male adaptor.  There seems to be a lot of cheap stuff out there that is nickel plated etc.  Does anyone know of a higher quality adaptor?  thanks, Jim