Hello Sir,
We've done a number of web scraping projects for our clients. We have scraped many directory websites including yellowpages, yelp and e-commerce websites including amazon, walmart etc and many more. We can deliver the data very quickly.
We use proxies with IP rotation to avoid being detected as bots. We use python with wget, scrapy, urllib and other tools to fetch webpages and parsers like HtmlXPathSelector, regular expressions etc to extract information from the html.
According to your description, as you do not need any special framework to install, so in keeping in that mind, we will provide you C# application for the same so that it can be run as standalone exe.
Looking forward to hear from you.
Thanks,
Shiv Agrawal
SuiGen Solutions