Search for parts on numerous web sites simultaneously

Search for parts on numerous web sites simultaneously We have a requirement to design a web interface page that can accept a part number of a product and then go off to a list of known e-commerce websites in the related industry (say 10 other known webs sites) and then search theses web sites for stock and pricing. The results are then read into a data base array and displayed at the initiating page. The concept is similar to a web crawler, but only goes to known web sites and to return information of available stock and prices from these web sites. This concept could be used for searching the globe for car parts, stationary items, electronic components etc or any group of products that consumers/customers go to the web for and search for items with specific part numbers.