Cable fixing bolt and Cable washer

Does anybody know where I can get the bloody things from? I have an Ultegra rear mech. that seems to have rejected the ones it had fitted leaving the chain permanently on the little cog and the cable end flapping in the wind.
If anybody has an old, knackered rear mech that still has the two small offending items attached and they’ll fit my Ultegra rear mech (I’d imagine they’re all the same aren’t they?) I’d happily Paypal some cash for them. I have a wanted ad in the classifieds as well.