To follow up on this....
I managed to replace my projectors a while back. I found an OEM set on Ebay. You need be carful that they are correct for your needs (LHD/RHD) as the shutters are physically different and can't be removed/swapped.
If it is Bi-Xenon headlights that you have, they from AL (Bosch assemble the overall unit, but AL provide the lense). Here is what an original AL lense looks like from my 2003 UK CSL which has Bi-Xenons + Headlight Washers). I was told all Xenons on the UK cars were from AL. Other regions may have ZKW ones.
Prior to finding the set on ebay I almost ordered from a site called retrofitlab, as they were very good with support. After a lot of research, these were what I was going to get
https://www.retrofitlab.com/en/xenon...rojectors.html
They also have some good videos on youtube showing how swap them over.