A VNA will do it, but these are expensive. There is a project called 'N2PK VNA' (which I've also been meaning to start but never have time. I might start it during the Xmas holidays).
However, even that is not particularly cheap.. expect to spend 2-3 hundred $ for the parts, or about £250 in the UK : (
You could also investigate the AD8302. If you find a good impedance meter circuit I would be interested. The N2PK is a big commitment (maybe a whole week dedicated to
soldering, testing, troubleshooting.. that's why although I look forward to it, I've never got round to it : (