Sorry but it will not easy to get a pull start for the TTR engine on the S2, I assumed. There are a few ways you can go about this if you cannot find a poll start for it:

1)Set up your box again and checked that the engine is not seized up
2)Loosen the glow plug and try starting again
3)If it still cannot turn, put a few drops of AF oil into the piston sleeve and try again
4)The Drill Start/Pull Start for the AE/TTR 21 on the MGT may fit
5) If everything else fails, get a new engine

Hope this helps!!