These figures are for the early period, The Border Wars, lances were used, but primary it was infantry on horses, fighting on foot if possible.
The large cavalry formations came later, also the more typical lancer. Such figures are being sculpted, men in the so-called "French"-jacket (English jacket) and with English caps - eventually with enlarged peak.
For then Poznan cavalry, you can use early German lancers with a head swap. Same goes for Poznan and Wielkopolska infantry, early German infantry with head swaps.
The mounted figures are made to fit Calpe horses.