If you can go SEE it first, see if it is indeed a re-packed Bosch.

German Auto Supply, autohaus (in Arizona) and Needswings - all of these I THINK carry them, but they are all in the States.

You MIGHT try a Mercedes dealership and use the MB part numbers I gave you... just a thought.
I can't beleive a MB dealership would sell anyhting but the OEM Bosch.