Injector O Ring....

nope but 3 of mine leak, one more than the others. It doesnt look too hard to do, but might be fiddly due to pipework around the injectors. I will have to do mine at some point too ;)
 
Upon dealing with an idling issue with my a4, i noticed the end injector seems to be leaking. discouloring on the inlet right around the injector.

I cant seem to get hold of any o rings. Has anyone had to replace these before?

What size is the 'O' ring (I/D and section) I may have some or can certainly get some. If you know what the material is would be good to or maybe someone else may know.
If you are still struggling send me one and I will to identify it. PM me if you need any help.