I'm sorry I have to post in the wrong section but I need as many replies as I can

I'm desperatly trying to find an antenna adapter for my new JVC head unit. Can some in the UK help me find the one I need or you guys overseas show me what I have to look for. I've had no luck finding the Metra one posted by NXMX5.

PLEASE HELP I'M ICHING TO GET THIS SORTED

MARK