Have you got Alloys and if so what are they? I note the Rangie 3 spoke alloy nuts have a different profile again to the ES 5 spokes on our Disco.
Unless you've spent a wad on alloys with humoungous centre holes then not many alloys will fit a IIa
Also depends if it's an early IIa or a late one as they had different threads / nut sizes.
Lee