In reply to SiWood:
If you end up having to replace it...
There are lots of other elixir models still in production even if the R. If possible, I'd try to stick with similar brakes front and back so e.g. your brake pads are interchangeable / compatible (you only need to carry one set of spare pads or you can put rear pads on the front to get you home in a fix) and only one bleed kit.
I say this from experience - being tight I bought a cheap Shimano brake to replace some avid 3s and ended up spending the best part of the difference on a new bleed kit and pads.