Quote: cod'ead "rleBay is your friendrl'"
Some good deals on there.
I've got a load of GU10 halogens in my house (a grand total of 15 lamps) and I'm in the process of replacing them with LEDs. I've had a lot of trouble finding decent ones but eventually found some excellent 4 LED units on a US website
rlDealExtremerl. They're perfect replacements for 50W halogens and reasonably priced if you buy in bulk, but those eBay units look similar for a little less.