Cisco firmware SCCP

Does any one know a source for Cisco firmware used in Wazo , the 8.5.2 for 7941, and 9.4.2sr1 for Cisco 7941, 7942, 7945, 7970, 7975. These firmwares are not available on Cisco.com as they are obsolete.
You can send me a private message at jkyawesome@gmail.com

Thanks
James Young