[Jager]

If you stopped pouring oil as soon as it happened you might have been lucky and just disconnect and remove the two section oil fill tubes, it could have rested in one of the plastic tubes. But since you have poured many quarts of oil through the fill tubes it's hard to say where it is now?? Personally I would still check the fill tubes or remove the oil sump cover. If not there find a good quality bore scope and look down into the crank case after you remove the oil fill tubes.

BTW if you remove the oil fill tubes, and they are original, I recommend installing new ones. A common problem... These plastic tubes get brittle over time and will crack causing a vacuum leak.