Recently purchased a 75 superbug for ground up rebuild. Like all superbugs the dash is in poor shape - cracks and starting to fall to bots. Does any one know where to get a replacement or how to repair them?

G'day & welcome

You cant get new dashes.
There is a plastic replacement cover thing - but dont waste your money

There are some places that reskin the dash. Not cheap - but is the best answer.
I will try and find some places. Google is your friend.

How bad is it? If just one or 2 cracks - silicon and vinyl spray is your answer.

Also speaker box felt works well

here you go - something like these people

http://dashboarddoctor.com.au//beforeafter.html 

I agree with Bizarre, get it re-done by one of these mobs. I modified mine and had it re-done by a mob in Brisbane (not operating any more :-( ), and it has been great.