Chainsaw Repair

I just saw it on Bike bandit also on Amazon so thats what i will do right now I dont want to get to that point and not have the gasket material ready.
 Now where do I get the seals and berings?any saw shop do? are there two berings?.and do you put in the seals first then slid in the crank ,.....Yea I guess that is what you do,.. and do you lube the crank shaft so it slides easily into the seals?