Sorry if this is the wrong place, didn't see anywhere better though.
So I was working on my DA 35mm f/2.4 because a couple of months ago, it got blown out of my bag (helicopters are neat) and thrown through the dirt. Since then, I'd noticed some grinding in the focusing mechanism, and since it was bought secondhand, I decided I would clean it out myself.
Since it didn't have a lens disassembly post already, I planned on doing that too so I went a little further than I needed to. All was well until I started putting it back together and learned just how tight some tolerances are.
This is the piece that got mangled during reassembly for being a fraction of a millimeter off-center. Fun, right? I was wondering if anyone knew what this little thing was called, so I could hunt down a replacement somehow. Buying a new lens isn't an option, as I'm a poor college student.
All help would be greatly appreciated, thanks!