If you post a description of how you do the finds by hand, we can tell you how to do this in more detailed form.
Here's the general format for a find script:
Enter Find Mode 
Set Field[yourtable::field1; "Yourcriteria"]
Set Field[yourtable::field2; "Yourcriteria"]
Set error capture [on]
If [get ( foundcount ) > 0 ]
Show custom dialog ["No records found"]
#Put steps here to switch to your labels layout and preview and/or print your labels
There are a lot of minor variations possible on the above script depending on how you need to construct your find.