We have a bidding site (kind of like oDesk). The crawlers should search the field "CVR-number" and should match the cvr-number of our providers with these 3 sites. IF the site finds a company with the searched cvr-number, the crawler should return to our site and check a box under the given providers profile.. If the search does not return any companies nothing happens.
The crawlers should repeat this search once every two months for each provider registered.
Budget is only a guesstimate. If the code is good we have much more work for you.
more info in PMB