Probably won't help, as the spacers are aluminium and so are the dropouts, I'd order some of these if I were you. In fact I once had some in the shed and I think I used them to solve this problem, but it will have been about 5-7 years ago so my memory is a bit hazy haha.
Either these: http://www.ebay.co.uk/itm/170852007642
Or these (but they may be too aggressive): http://www.ebay.co.uk/itm/370820758607
If you put them in between the dropout and the hub, and on the outside between the dropout and the hub bolt and lamp them up tight, it should sort it.