I had something similar to these before… couldn’t get rid of an annoying vibration above 40mph no matter what I did. Replaced them with some decent hubcentric ones from these guys:I could get away with 11mm but not sure they will still have a problem fitting ? Have you ever used the spacers without the hub lip part like these ?
Security measure
www.ebay.co.uk
If you can’t find what you want just message them and they’ll make it, found them very helpful