Reverse 1031 or other options if we have found the next property

We are trying to do a 1031. We have a property for sale but we have not had any offers yet and we have found a duplex to buy. The seller of the duplex does not want to wait for us to sell the other property. Are there reverse 1031’s? Or could we put the duplex into some kind of holding company until the 1st property sells? Or is there a better option? We’d really like to use the 1031, the 1st property is a flip and we’ve only owned it for 2 months so there will be short term capital gains taxes.