To start with, you should know that the lights in the picture are the early versions. These are correct for 123's up to about early 1980 I think. After that time, the Euro lights had lenses and reflectors that were more rectangular.

Secondly, there are many sources. I would start by contacting Phil at Fastlane on this site. If that doesn't work, post back here and I will list some other sources.

Good luck,