Are '90 minute' wood fire doors really $1300????

[Johann Jells]

I have several mineral core wood veneer apartment doors that have failed after >25 years, like exploded, delaminated, whatever. I just got 2 prices on doors.  One from a lumber yard for just the door, pre-mortised for hinges and drilled for locks as mandatory for sale: $1300 each. The other installed by a door company: $2200 each! Does this sound reasonable?  It all sounds nuts to me. 

Unfortunately the construction of the doorframes makes using a steel door and frame a huge project of ripping out 120 year old trimwork that will never be the same again, so I'm stuck getting the mineral core doors.