How do I find a fire-rated door that won't dent easily?
A metal fire rated door is not required.
The door between the garage and house shall be 1) a solid wood door a minimum of 1 3/8” thick, 2) solid or honeycomb core steel door that is not less than 1 3/8” thick, or 3) a 20 minute fire rated door. (See ICC R309.1)
A door is not allowed between the garage and a sleeping room. (See ICC R309.1 openings)
I’d use a solid core wood door with a door frame that has an “intregal door stop” rather than an “applied stop”.
Garages are to be separated from single family residences by 1/2” gypsum board on garage side ONLY, provided the garage does not open into a sleeping room. (See ICC R309.2)
Make sure you confirm all this with the AHJ.
Oh, if you’ve got to have a metal door try Entek.com. Terrible website, but great customer service. Give them a call.