LED ́s, blue light bulbs etc.

Please post what you used for alternatives to the normal halogen floor light bulbs at Xenon headlights. I wanted to buy white or blue LEDs at ATU yesterday. They told me, however, that all LEDs were taken from the market by the ATU supplier as well as all colored or white pears. Presumably: there was trouble because of TÜV. What’s going on? What and where else can you buy? How about the approval?