Hi mate,
I'll have my spares with me. In terms of finding them, as far as I know:
JT Models: - got them on order, not sure when they are due?
Champ: - they can order them from Tamiya, not sure how quickly given how things are in Japan
Speedtech: - the parts are in stock at Tamiyausa and Speedtech can get them in in under a week
MuchHobby: - not sure if they had them in yet but Tamiya Canada do!
So they are about