Even though you don't want to go back to the retrieve spec, you can automate this with SBasic in order to get to another result set. This can be done by using ClientLocalValue to store indicators that SBasic can use.

You'd have a command button on the form that sets a ClientLocalValue, then navigates to the retrieve spec via @SelectTreeItem. In the OnRetreiveSpecOpen event, you determine if the ClientLocalValue has been set (which is has in this case), set your retrieve specs to what you need to find the target record (maybe with info stored in another ClientLocalValue), then use @SelectTreeItem("Search Menu!Search Commands!Retrieve New Results (F10)") to open the new result set.