Ylee, I had some Porsche Cookie Cutters done at Bead Blasting Services in Powderhall, Edinburgh, and was impressed. This was a good few years ago. Assuming they're still there, its worth giving them a call. Price was very reasonable, IIRC.
I had mine done by spit and polish. Johnw reccomended them (through an agent). Was £45 per wheel inc VAT. IIRC Wicked wheels are about £75 per wheel. The finish wasn;t eprfect on my wheels, but not too bad.