Re: looking for a shop or web business that sells parts
If you follow this forum, you'll see a plethora of vendors. Look at both sides of this website, and you will see about 15 vendors.
I will tell you, I went to Pistonbikes.com and I had a great experience with these guys.
Either way, you can look and see what you need, and some great ideas for things you probably never thought of, too.
As just a thought, call the people who you want to buy from and ask them questions. If they are slow to respond, or will not respond, then go somewhere else. Don't buy from anyone who has no tech-support, or no support at all.
I hope this helps.