Develop an automated program to crawl website for information

Need a website crawler program that will go to our competitors websites and check all of their products prices and put the product name and price into an excel sheet. The program will simply need to connect to their website, select the first item from a drop down box, select no defects in a checkbox, click next and be given a price, grab that price and put it into a specific csv excel format, then do this same thing to the entire dropdown list. There will be a total of 8 sites we will be starting with but we will add more sites soon. I am looking for prices per website as we will be doing many and all websites will follow the same simple patterns. We will be looking for one program that will go to all websites then combine all results from all website into one csv file in a specific order. We will provide example websites and csv format via messaging. We will need future support on these sites if the sites are ever altered and again we can pay a flat fee per site for this if needed. Site examples will be given upon request.