Can you just set up a custom search engine with the URL's of the sites for the industry? https://cse.google.com/cse/ https://cse.google.com/cse/ Your effort wo

Can you just set up a custom search engine with the URL's of the sites for the industry? https://cse.google.com/cse/ https://cse.google.com/cse/ Your effort would be just to paste in those URL's, no need to develop / maintain any site of your own.