I'm glad you figured that out. I have a Saeco machine (Magic Deluxe) from 2004 that I've kept in working shape. Parts still aren't too hard to come by on ebay - although I'm now replacing the boiler and did end up with the wrong part before finding the correct one. Now I figure if I can get a gasket kit, I can fix the boiler I'm pulling out and have a replacement on hand when it leaks again in 5-10 years.

For the most part, googling part #s and looking at pictures will get you pretty far. These machines share a lot of parts with other Saeco/Gaggia/Philips models.