The winners are easily accessible in any Penn Relays program. You probably already knew that. If there are any splits that are really good they will also be there in the Top 10 splits for 400-800-1200-1600. As for the other results, if you really want to know you will probably have to go to Philadelphia and check it out. The results are all sitting there in giant three-ring binders, but I doubt the staff is going to tell you all the splits over the phone. The office is open Mon-Fri and is just outside the stadium in the Hutchinson Gym. Call ahead of time and make sure someone knows you are coming.
Its possible someone on Letsrun could dig them up, but I doubt it -- if you are on the Oregon t-and-f digest listserve one of those dudes might have them too.