Sure, for UK based options:
http://www.modelsport.co.uk/32dp/rc-...ID[41]=643
The RW ( 5mm shaft ) options would be great, as would the Robinson racing pinions. Mike's pinions are great but international shipping is killer as he needs to send recorded delivery- he may be able to cut a cheaper deal on shipping costs if you ask nicely though. Otherwise, try the list of Pinion gear suppliers here:
http://www.robotwars.00server.com/trucklinks.html
scroll down a little. Alloy pinions are hopeless though yeah, either the teeth wear out after a few runs or the grub screw strips too easily- hardened steel all the way
