Are reman calipers OEM?

I ordered a pair of remanufactured front calipers for the 300E since mine are borderline seized. I assumed that remanufactured meant that the frames would be original Mercedes parts with aftermarket seals and intended to ask if I should replace the seals with real OEM seals. When I did a search to see if anyone had already answered this question I see posts which lead me to think the remanufactured calipers available may not use original Mercedes frames. Is this correct? The ones I ordered were remanufactured by Fenco.