Fuel Pump and Assembly Serial Numbers

Does Rotax have information on what serial number fuel pumps were shipped with an engine?  Or if I have a single fuel pump serial number read from the fuel pump is it possible for Rotax to have the information on the second fuel pump and the assembly on record?  The installation in my aircraft is not in the most convenient location and I didn't keep the housing because my aircraft model doesn't use it.  So I can easily obtain one of the serial numbers but the other one is against a surface.

Thanks in advance, and for hopefully helping me avoid pulling the assembly to get serial numbers.