Most of my major databases have a field called 'Marker' and two scripts -
Set Marker
Clear Marker
You do your find and then Set Marker. Subsequent finds use the value in Marker ('X' for imagination) plus any other criteria. This is very handy for complex finds.
Set Marker, by the way, is just a single 'Replace' script step.
HTH
Paul J
Cheers,
Paul J.