Scraping Google Sketchup, pt.1 by @mtrc

private static IEnumerator aSyncSearchForModel(string searchterm, MineMain root){
		WebClient w = new WebClient();
		string htmlstring = w.DownloadString("http://sketchup.google.com/3dwarehouse/doadvsearch?title="+searchterm
									+"&scoring=d&btnG=Search+3D+Warehouse&dscr=&tags=&styp=m&complexity=any_value&file="
									+"zip"+"&stars=any_value&nickname=&createtime=any_value&modtime=any_value&isgeo=any_value&addr=&clid=");
		HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
		doc.LoadHtml(htmlstring);

		//Grab a result from the search page
		HtmlAgilityPack.HtmlNodeCollection results = doc.DocumentNode.SelectNodes("//div[@class='searchresult']");
		string model_page_url = "http://sketchup.google.com"+results[0].SelectSingleNode(".//a").Attributes["href"].Value;

		htmlstring = w.DownloadString(model_page_url);
		doc.LoadHtml(htmlstring);

		//Find the downloadable zip file
		results = doc.DocumentNode.SelectNodes("//a[contains(@href,'rtyp=zip')]");

		string url = "http://sketchup.google.com"+WWW.UnEscapeURL(results[0].Attributes["href"].Value);
		url = url.Replace("&", "&");
		UnityEngine.Debug.Log (WWW.EscapeURL(results[0].Attributes["href"].Value));
		UnityEngine.Debug.Log (url);

		WWW model_zip = new WWW(url);
		yield return model_zip;

		string file_loc = "path/to/downloads/"+searchterm+".zip";
		System.IO.FileStream filestream = new System.IO.FileStream(file_loc, System.IO.FileMode.Create, System.IO.FileAccess.Write); //Assets/Resources/sfx/
		filestream.Write (model_zip.bytes, 0, model_zip.bytes.Length);
		filestream.Close();

	}