Ugly solution, tag on the control hosting the instance:
Protected Overrides Sub fileListView_DoubleClick(sender As Object, e As EventArgs)
Select Case sender.parent.tag
Case "Fix530"
sender.parent.parent.parent.parent.parent.parent.parent.parent.controls(1).controls(0).controls(0).controls(2).text = DirectCast(sender, System.Windows.Forms.ListView).SelectedItems(0).Text
End Select
End Sub