Yes, I pretty much get all my gaskets from eBay now, and most are N.O.S. originals. The Athena filter gaskets from Mike's are very good but you can't beat originals. And if you shop around, many times you can get them cheaper than Mike's too. Here's a pair of original sump gaskets, a little cheaper than Mike's .....
http://www.ebay.com/itm/201616950215?_trksid=p2060778.m1438.l2649&ssPageName=STRK:MEBIDX:IT
http://www.ebay.com/itm/201616950215?_trksid=p2060778.m1438.l2649&ssPageName=STRK:MEBIDX:IT