Setting FileExplorer paths in FormTemplate of a Grid

I have a grid that uses a form template for editing the grid items.  When the user clicks the edit command for a row in the grid it opens the FormTemplate that contains a FileExplorer.  I need to then set the configuration path of the file explorer as it's different for each item in the grid.

It seems the FileExplorer paths can only be set on the page_load event, but at that time I don't have access to the GridEditFormItem that allows me to get the file explorer control and set the paths.

Is there a way to make this work?  It seems pretty strange that the view paths can only be set in the page_event.

Thanks