Cambridge Classics was a Mervyns LLC Brand. Although the manufacturers were independent, their products were distributed by Mervyns under the Cambridge Classics brand. Since Mervyns Corporate was unable to find a buyer for the company, it went out of business and closed it's last stores in December 2008. Cambridge Classics Underwear overruns were sold to outlet stores for final liquidation. The only place to find this brand is through one of these liquidators or private vendors posting on sites such as EBAY.
Unfortunately, Cambridge Classic was a brand associated with mervyn's store, and are now all out of business. I recall possibly to have seen a smaller cambridge line available at sears, but I am not sure
Dresses could be found just about anywhere. Try Macies, Kohls, Mervins, or some brand name stores like Abercrombie. If you are willing to pay a lot of money go to Betsy Johnson. If you want a cute dress that's not expensive go to JC Pennys or Kohls. Believe me, if you take your daughter to Abercrombie all the dresses will be too racy or won't fit right!
Stores that start with the letter M:Macy'sMaggie Moo'sMarshallsMeijerMen's WarehouseMervynsMichaelsMotherhood Maternity Outlet