meister zeta crd coilovers £800
underseal anything from 400 to 800 depending on where you go and how bad your car is.
tyres. michelin pilot sport 4 expensive but worth it.
rollbar links, mx5 parts
to be honest your looking at doing everything iv pretty much done (except for brake pads) since i got my mark 3 back in september.
here is a link to my project thread. the thread is a bit untidy but stick with it and you will find most of what you seek.