Hi Rosie,
I have exactly the same dryer and exactly the same problem.
I found the piece you need to fix it on ebay for $25 + $5 postage... see http://myworld.ebay.com.au/spanbow/
Anyway, you might be able to help me- after I replaced the piece and put the dryer back together, I had a piece left over.
A little metal wire (like a coathanger). I know it sits on the motor assembley somehow, but don't know exactly how.
If you have yours open at the back, perhaps you could explain where or send me a pic (beamishfamily@gmail.com)
Anthony
May 2008