Manappuram Finance Limited (BSE:531213) is seeking to bring on board a private equity investor for Asirvad Microfinance Limited.The group has appointed Credit Suisse to look for investors and is in talks with leading private equity players to raise $100 million, said three people with direct knowledge of the deal. "The company is looking to sell a significant minority stake in this unlisted subsidiary," said an investment banker with knowledge of the plans.