I have a couple of old zorro ethernet cards that have BNC connectors. I need adapters so that they can accept a normal ethernet cable. I want to make sure I'm getting the right thing, since these connectors are also used for video (not what I want). Any good leads on where to get a couple of these adapters for my network cards? -- I'm in the USA -- I need the adapter to have a male BNC end to plug into my current cards. Thanks.