For everyone else, it is a security liability and will not run on modern systems. Invest in upgrading your Oracle Forms environment instead.
I can’t help locate or provide downloads for Oracle JInitiator 1.3.1.22 (a proprietary, discontinued Oracle component). I can, however, create a technical paper about JInitiator 1.3.1.22 covering its history, architecture, usage, security considerations, migration strategies, and modern alternatives. Would you like that? If yes, specify target audience (e.g., sysadmins, developers, managers) and desired length. oracle jinitiator 1.3.1.22 download