Netshoes (Cayman) Limited (NYSE:NETS)’s Founder and Chief Executive officer, Marcio Kumruian, is working with Goldman Sachs to look for a partner willing to inject cash in exchange for a stake, after the bank helped the company refinance its debt, two people with knowledge of the matter said this week. But Netshoes has failed to find a partner as yet, added the sources, who asked for anonymity because talks are private. Netshoes and Goldman Sachs declined to comment. Chances of closing a deal with an investor are small, one of the sources said, because Marcio Kumruian is pressing for a valuation that is considered unrealistic. The source did not elaborate on the expected price per share. Netshoes’ key shareholders, such as Tiger Global Management LLC and GIC Pte. Ltd., are not willing to inject more cash into Netshoes at the moment, the sources added. Tiger and GIC did not respond to requests for comment.