Hiž
I have bought this one from ebay
http://www.ebay.co.uk/itm/Locking-W...261399?hash=item1a0dc67c17:g:Iq4AAOSw9N1VzGHJ
Tread is one that will fit R4 but cone need to be redone.
As cone that you get with nuts is not the same to alloys, at least to mine alpina/gordini R5 alloys.
Send nuts to lathe guy and all is fixed within half hour and some 150kn (15 GBP)