I'm not sure if there is a quiet pump. But as above there are a couple of ways to make it quieter.
Make sure the pump is mounted on a rubber or soft foam pad.
Cut the PEX tubing near the pump and add some hose clamps and flexible line.
Use some foam and follow the water lines out of the pump. Wedge a piece of foam between the hard lines and the walls and floor.
Add an accumulator tank into the system. An accumulator will allow a flush or two without turning on the pump making for a silent flush. The downside is once the accumulator pressure bleeds off the pump has to run longer to re-pressurize the system.