looking for any Asel/Assel (different spellinigs in the 19th century).
I think, there is something for you:
Friedrich Assel, born in Hatzenbühl/Germany ca. 1771, emigrated to Speier in Russia in 1809. (This must be your Schpier!). Speier, named after the historic town at the Rhine river, was a colony of Palatines in Ukrainia.
Friedrich had children as follows: Friedrich, Stephan; and, born in Russia: Magdalena, Anna and Matteas.