If you’re a fan of the Caché women’s clothing chain — or more accurately, if you were a fan — now is the time stop in for some last-chance bargains. Caché filed for Chapter 11 bankruptcy in February and had planned to keep some stores in operation, but all that changed last week when a liquidation firm purchased the company’s assets. The Westfield Montgomery Mall store has started major markdowns for its going-out-of-business sale.