Place for Used or Inexpensive Interior French Doors?

Wife and I expecting a baby in late November and need to 'cordon off' a room we have in the house and want to put in french doors to do that.

Not looking to invest in high end designer doors or anything and Home Depot/Lowes don't have any available that won't take at least 2 months to deliver.

Am curious if there is a source for 'used' doors like this or some sort of 'wholesale warehouse' where I could find a unit that we either recondition or whathaveyou.

Basically looking for a basic double french door that we can get our hands on w/o breaking the bank.

TIA