As far as I'm aware you can't pull the "completed" application from IACRA (with the examiner's notice of disapproval & failed areas on it). Much like with your knowledge test report you need to hang on to that original bit of paper.
I don't believe you NEED to bring the Notice Of Disapproval with you to a retest though.
61.43 says, in part:
f) If a practical test is discontinued, the applicant is entitled credit for those areas of operation that were passed, but only if the applicant:
(1) Passes the remainder of the practical test within the 60-day period after the date the practical test was discontinued;
(2) Presents to the examiner for the retest the original notice of disapproval form or the letter of discontinuance form, as appropriate;
(3) Satisfactorily accomplishes any additional training needed and obtains the appropriate instructor endorsements, if additional training is required; and
(4) Presents to the examiner for the retest a properly completed and signed application.
So you only need it if you want to skip over the parts of the test you passed. If you don't have it, or your retest is more than 60 days after your original failed checkride, the examiner will have to give you a full exam, with no credit for the stuff you already completed.
Given that you failed the oral there's probably not much "credit for those areas of operation that were passed" you can claim, so it probably doesn't matter much that you lost the original notice of disapproval. You're almost certainly getting a "full checkride" anyway.