Your all going about it the expensive way!
You need longer studs @£22.85:
http://cgi.ebay.co.uk/WHEEL-STUDS-ALL-FORDS-M12-X-63-MM-LENGTH-BRAND-NEW-SET-/290429608649?cmd=ViewItem&pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item439ef422c9You need spigot rings (one either side of the hubcentric spacer) @£10.74:
http://cgi.ebay.co.uk/SPIGOT-RINGS-1-00-PER-RING-JUST-CHECK-SIZE-ORDER-/220570441540?cmd=ViewItem&pt=LH_DefaultDomain_3&hash=item335b05d744Then you need to source any hubcentric spacer going cheap on eBay, which might cost £20 a pair.
A spigot ring (which you can get in almost ANY size) will centralise the wheel/spacer/hub, so you dont really need a custom made hubcentric spacer.
I bought 4 x ford hubcentric spacers for about £25. They were multi fit on the studs.
All in all, i spent around £50-£60 on mine to stop the wobble
However, on the rear, i found them pointless, as the rear hub is near enough flat, so you cant centralise anything on there. So save your cash, and just stick some standard spacers on there