Apologies fella but I've just dug it out of the cellar and it bolloxed.
To be honest you don't really need a spare, belly pans are the last thing to get ruined.
I've had my share of tumbles and never once damaged one.
Have a look at Ricambi Weiss for a bikini style one if you really want a spare to take to meets. They are top notch quality and reasonably priced too.
Bars, levers, footpegs, seat unit, nose cone with bracket, bikini belly pan and gaffer tape are ideal spares to have but we all muck in if the worst happens to get you back out.
It's not the size of the dog in the fight that matters, but the size of the fight in the dog.