Instead of the wanky work around for custom search results for products (which no longer works for my site) I found that just be adding ‘&post_type=product’ after the ‘?s=’ in the search form action something like this:
( http://wordpress.com/?s=blue&post_type=product )
automatically shows the results for products in the same way my shop page looks for anything else.
Now I just need to find a way to allow pros header search component to add this post type designation to the form action url.
Any suggestions?