1988 240GL Adjusting headlights

[Graemer]

The plastic clip has deteriorated and wont hold the reflector

photo 1.JPG (27.63 KiB) Viewed 814 times

Hi All, I have three 240 GL's ('88, '89, '90) and all of them have the same problem and I suspect its a common problem... I can't adjust the headlight direction due to broken clips (as pictured). Is there an after market or simple fix for this or is it a new headlight assembly?
Any help would be greatly appreciated.

Cheers