I threw out a couple lines and got one hit, a company named Melett. They said they have nothing to help, but they did give me another lead. I have an e-mail out to them and I'll forward any info I get.
From my first contact, it looks like I'm going to get pushback because I'm an end-user, not a shop. I'll pass along anything hopeful.
Thanks for the picture. Do you have the dimentions of that part. I found generic diaphragms in my search with 35mm, 38mm, 40mm, & 44mm bodies intended for wastegates at http://www.ssautochrome.com/level.itml/icOid/1544. They also sell psi rated springs. I doubt these work, but it made me think.
BTW, do you have the part number of the 2004 S60R turbo?