Need a Web Crawler Built

I need a web crawler bot / program that will do the following: - Craw the web based upon an input keyword, i.e. "classical music" - the crawler will find all classical music and related websites and compile a list of URLs - The list of URLs will be checked to detect if any of the URLs are expired (take a look at the program, xenu sleuth (free program). This program can take a list of URLs and essentially find the domain names that are expired.) - The expired domains should then be ran through [login to view URL] (free service) to check each domains page authority and website authority. Basically, if I input one keyword (niche specific), I expect the program to continually craw websites and compile a long list in that niche until I stop the program. It should then export the list of expired domains it found including each domains page authority and domain authority.