Hey Eryck,
I bought a new set of 4 from an eBay seller last year. They look great on the car.
Be aware that they have separate clips for attaching to the wheel rims. Each wheel has about 5 clips.
I re-used my existing ones.
I think SLs in Germany sells them.
Alternatey they are available from MB. Make sure you are sitting down when you are given the prices.
Bob Smith (Brisbane,Australia)
RHD,1967 early 250 SL, auto