A cheap alternative is to use the black wheel nut covers that were fitted to MK2 golf GTI's they are a good tight fit and should cost less than GBP5.00
Steve
I have 12 spares as my son in law bought me a full set at a car autojumble. The only problem being when you take them off,the nuts are even rustier.
I think someone used to do plastic chrome ones,which would look nice.(maybe!)
2000 BMW R1100s
1964 Royal Enfield 250cc Crusader
2012 Mazda Mx5 2.0ltr Kuro.
2004 Roller Team Granduca 171.
1992 Jaguar 4ltr Sovereign.
2018 Volvo t3 v40 Cross Country.
Reg & Gwen.