What you are wanting to do is recover $10,000 of basis that your CPA failed to report. The complete way to do that would be to prepare and file all of the missing Forms 8606 with explanation. The incomplete way to do it which may or may not be acceptable to the IRS would be to file just a current-year Form 8606 with explanation, assuming that it's still the case that there have been no distributions since the $60k Roth conversion.
