Sorry mate, there is no such thing.
Start with looking at the manufacturers web site.
If not try here or google the shaft in question, you might get lucky. If not, you have to approach the problem as carefully as you can. But make sure to use google, ask questions etc. first, it could potentially save you alot of problems.
Remember that companies like Predator will void any warranty if you work on their shafts. Having said that, a good repair can improve the shaft your repairing..