That sucks man! http://shop.mobileweb.ebay.co.uk/searchresults;PdsSession=79a6d24013d0a5e946a26b82fffb73d7?kw=Airsoft+pinion&cmd=SREF&fads=All&call=All&sort=BestMatch&mfs=GOCLK&acimp=0&isNewKw=true - had a quick look on eBay
