Propeller bolt info

Hi!

Currently maintaining a Zlin Savage Cub with a Rotax 912ULS engine. The current propeller installed from previous owner 
is in an unknown condition, and not approved or "recommended" from the factory. 
I am about to try the standard wooden propeller that those aircrafts normally leave the factory with, but here is the question:

Where is the best option to find information about propeller bolts? And where do you buy those?
Looks like 8.8 M8 metric, and the ones installed on the "not approved" prop is safetied with lock wire on the heads.

Is there any standards in the rotor world?

I am from the more "certified EASA world", and not used to hunt information like this.....