I have some fittings that take a smaller than normal GU10 halogen bulb like this...

http://www.diy.com/nav/decor/lighting/lightbulbs/halogen_bulbs/-specificproducttype-mirrored_reflector/Diall-Halogen-Eco-28W-GU10-Mini-12418909?skuId=12939615

They look a bit like a standard 50mm halogen downlight bulbs but are physically smaller in length and diameter. Has anyone seen an LED or CFL in this form factor?

The fitting are rather nice copper outdoor fittings and would cost the wrong side of £700 to replace them with ones that take standard size bulbs.

Or these. They do look like the same item though.
http://www.energylightbulbs.co.uk/products/3w-mini-gu10-led-30w-light-output-replacement-for-small-gu10-35mm