You could also try the address where I got my used ones - http://www.europarts-sd.com/
. They were about $300, didn't reguire a trade in. I went with them because they were only about 45 miles from my house, and I wanted to look before I paid! He had about 3 or 4 pair from grey market 300Es that were being parted out. All had good glass lenses, most had minor pitting on the reflectors that didn't affect the light output on the ones I got. They all were Hella units, with the star indicating an "official" MB part, and they all had the vacuum servos for the dashboard leveling knob feature (which I didn't use). I've been happy with mine - the fog lights on these put out more usable light than the old US light's low beams!
2003 Firemist Red/grey leather SL 500
2015 Palladium Silver/black mbtex GLK 350
1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD)
Click to see 87 300E