overriding the order of accidentals in a chord

[Kieren MacMillan]

Hello all!

Is there an easy way to override the order of accidentals appearing next to a 
chord, e.g. have the natural come first in the following snippet?

\version "2.15.14"
\relative dis { \clef bass <dis! a'! b> }

I'd like to avoid manually tweaking the position (e.g., offset) value of each 
accidental, if possible.

Thanks!
Kieren.