Does a 60 minute fire rated door even exist?

[Marcus Robinson]

I have city inspector requiring that I have 60 minute fire rated doors installed on the entrance of two units that are inside our property. I’ve had a heck of a time trying to find them. Contractors, builders, lumberyard, Home Depot managers, internet searches and still no where to be found. I’ve only found 20 minute and 90 minute (steel door) that are fire rated. I’m starting to think they don’t even exist. Any suggestions?