I have just bought some for my kitchen from a site I clicked on from the Megaman site - Iconiclights.co.uk

They are selling both the the non dimming and dimming version Megaman energy saving GU10 (7w, 9w and 11watt).

11 watt GU10 (BR0711i 10k hours) £8.50 for one, 10% off for 6, 15% off for 12.

I bought six of these 11 watt (Normal bulb 50 Watt) GU10 for £45.90 and the light is fantastic!!

http://iconiclights.co.uk/GU10_Bulbs-list.aspx

If you want the dimming ones the link is below: