Perhaps put him on the list and see what happens in the mean time. Would he be starting there straight away? I know at our daycare they say TT is a requirement for kinder but they also work with the kids that are in pullups etc rather than nappies.
Personally I would not be pushing the TT - I tried with DD1 and is was not worth the angst - but you could get some undies and talk about it. It may also be worth discussing it with daycare as that was where it all started for us.
Good luck!