Here's a clue for you: Some emerging markets publish, on a DAILY basis, foreign inflows and outflows, for free. All things being equal, they provide good proxy for Trimtabs' product. Here is one of my favorites:
http://www.tse.com.tw/docs/market/t13sa230.htm
http://www.tse.com.tw/docs/market/t13sa230.htm
Quote from PuffyGums:
www.trimtabs.com
TrimTabs Investment Research is the only independent research service that publishes detailed daily coverage of U.S. stock market liquidity, including mutual funds flow.
rates? $30,000 per year.