Haha
I managed to find a spacer that is similar online. It's not ideal and causes a bit more play, but it's better than not racing the car. I've spoke to Tamiya USA and Uk and both have said that Tamiya have no stock of the MB16 spacer and won't for a while. I think it is a good idea to order a spare set of the uprights/c-hubs, I've order a replacement and a spare, but I'm racing tomorrow and they still aren't here