Jamie from Trulia here, you can actually perform this search like you would on for sale listings and then just click on the sold tab below the map to see the sold listings. i have provided the url for the search you stated in your question. you can also set up an email alert (look in the left side of the page) to be notified when new sold properties happen. Hope this helps.
A local real estate professional would have online access to all sales through public records, You can contact one using http://electronicappraiser.com or http://housevalues.com They may have an agent that would send you information.
If nothing else, you could contact Gary through his profile by clicking on his picture.