Oops hehe I guess I should have read that a little better.How did you manage to break that?Does your radio have an End Point adjustment?If so you should adjust it so it doesn't stress the crank.As far as an alloy one I haven't seen one but you may be able to make your own using something like this http://www2.towerhobbies.com/cgi-bin...?&I=LXS483&P=7

You could cut one end off so you get the L shape but I wouold just replace it with the original one