Yikes! That beats me! I only had to round them up for NINE. I, too, was given only a few days to do it. I got the email on a Wednesday and had to send them by the following Monday.
5 of the classes that they requested were prerequisites that I took within the last year at community colleges. So, that was easy because I still had all that stuff.
4 of the classes were from my undergrad degree (2001-2005) so, those were significantly harder. My college had all of the course bulletins archived online so, I managed to dig-up the course descriptions. One syllabus I happened to find online just from googling. The instructor had it up on her website since Spring 2002!! Isn't that crazy?
For the other three syllabi, I just started calling departments and emailing my old professors. For two of them, the department had them in their records and just emailed them to me. I couldn't track down the third syllabus for the exact term that I took the course (Winter 2002). However, my instructor still teaches it every year and he sent me the current version of the syllabus with a quick note that said the content of the course has not changed at all since I took it with him 8 years ago.
Oh- One important thing to note- For the social science requirement, I ended up changing the courses that I used as prereqs to make it easier to find the syllabi. When I applied, I put down two random Anthro courses because I just wanted to use classes that I had received A's in. However, Anthro changes their offerings every year and I figured it would be impossible to find those syllabi and hard for UMich to figure out how to transfer them in. So, instead, I asked if I could use two classes that I took from my undergrad's Economics core. Those classes are the same year after year so, I knew it would be easier to find the syllabi. Plus, since they're just part of the core, I knew that UMich should have similar courses that those classes could transfer in as.
Oh, yeah-- One other tip-- I spoke with a lady at Admissions and she advised me to look at their school of humanities and social sciences (I forget the exact name) website. On that website, you can find a full transfer guide for every state that shows what classes are acceptable to transfer into their school. You can look up the colleges that you have attended and see if you took any courses that have already been approved for transfer (in other words, someone else has already transferred to UMich and used those courses). If you've taken any classes on those list, you can try to use them as prereqs instead and that would make the course transfer process a little smoother. It turned out that one of my Econ core courses was on that list so, I could feel more confident that it would be approved for transfer. I hope I'm making sense here.
Good luck, Sara!!