Output: -5V, 1A, ripple<5mV.
ADI have several inverting regulators that you can check. See link below. There are also available evaluation boards that you can order so you can check the performance in bench.
Selection Table for Inverting Regulators | Parametric Search | Analog Devices
For specific output as per your requirement you can use this kind of product which might be helpful.
Retrieving data ...