Substitute for lemon grass in curry dish I have a meal planned in a few days and it calls for lemon grass.  Problem is I've been to the store a couple of times and they don't have it.  

(the store is a block away and I don't feel like driving all the way to the next one to look)

The dish is curry spiced noodles, basically a stir-fry.  Any suggestions?
Well I would suggest if you really can not get it, then leave it out altogether.  It provides accents of flavour rather than a primary usually in most curry recipes, so it can be omitted.

If you want to substitute it, then you can use lemon or lime zest, possibly with some mint leaves to freshen it a little.  But the end result will not be the same, just enhanced in a similar fashion to that which lemongrass achieves.