There is no mention in any DPD, FBI or SS report of its having been verified that no curtain rods had been taken from the Paine household. An absurd omission!
In Reclaiming History, Mr Bugliosi imagines the key questions running through Captain Fritz's mind:
"Were any curtain rods found at the Depository, or in Oswald?s room? Did his apartment need curtain rods?"
Notice the question Mr Bugliosi leaves out:
"Were any curtain rods missing from Mrs Paine's garage?"
Maybe it was there in the draft text, but didn't survive proofreading stage! 
While I have no problem accepting that a couple of curtain rods were found somewhere in or near the TSBD that caused someone to suspect that they might be the curtain rods that Frazier said that Lee told him he had in the flimsy brown paper sack that morning.
And I suspect that it was a TSBD employee like Harold Norman, or Bonnie Ray Williams ( just as an example) who discovered them and told SS agent Howlett that he knew where some curtain rod were hidden.
How could anybody know if they were curtain rods missing from the Paines garage....?? Ruth Paine may have been able to state the number of curtain rods that she had stored in the garage but ... Who could verify that number was accurate??
"Were any curtain rods missing from Mrs Paine's garage?"How could the answer be established with 100% certainty?