No, sorry, I don't have them in my database, and I haven't found them on geneanet.org or gedbas.genealogy.net either.
Becker is one of the most common surnames in Saarland, so it could be tough finding the right one...
I also googled Wilhelmina/Wilhelmine Foellinger/Föllinger/Fellinger/Voellinger/Völlinger/Vellinger, and all I found was this:
http://www.familysearch.org/Eng/Search/igi/individual_record...Johanna Friederica Wilhelmina Fellinger, born in Aachen 04/21/1823, daughter of Johann Jacob Fellinger and Anna Christina Wildenstein
And this:
http://gedbas.genealogy.net/datenblatt.jsp?nr=1016286709Johanna Friederika Wilhelmine Fellinger, born in Aachen, married Friedrich Wilhelm Heinrich Richard Trostorff of Vaals on 05/30/1849
That's probably not your Wilhelmina. Though the dates are similar, and Aachen was in the Rhine Province of Prussia, too.