Hi Ryan,
Don't know how your pins dropped out as the ones fitted to my buggy are a force fit. My pins just got hammered into oblivion until they no longer provided the link to drive the wheels.
The web page you want for Smartech spares is
http://goldstarstockists.net/tamiyaparts/tpx/carson.htm
This should work. If it proves not to then go to either time tunnel models web page or goldstar and follow the prompts to reach the parts list.
I'm fixing my drive shafts 'cos I don't want to keep shelling out on these piddly little pins every few weeks.
Safe driving
regards,
Chadz [8D]