yep got it T:Thanks peehee,
They're Kahn design RCS 20 x 10.
They were used a fair bit on Kahn Range rover upgrades.
I saw them on a van on the forum and had to have some.
They come up every now and again on e-bay (which is were I got mine).
You can buy them new off their web site if money no object !!
I'll pm you my costs.