I live in switzerland, any good advice for that region?
Travel to Zermatt and do the hohbalmen hohenweg 
But for parts, have a look on ebay, particularly if you want to buy in quantity and don't mind waiting a week or so for items to be shipped from china.
You could also try dealextreme, they have a eclectic range of LEDs, such as:
20 packs of red, green or orange for $2.35 each including shipping
http://www.dealextreme.com/details.dx/sku.11099
http://www.dealextreme.com/details.dx/sku.11100
http://www.dealextreme.com/details.dx/sku.11101
or this 60 lumen! white emitter for $2.75 including shipping.
http://www.dealextreme.com/details.dx/sku.13286