SL100 parts

First of all this forum is by far the best I've seen, the sense of community can be seen all throughout. Now I'm a newb to all this and I am trying to cafe an SL100 in the style that eyhonda is doing (beautiful work by the way). Also I've only been on two bikes before like a million years ago, so like a said new to all this.

Does anybody know where I can find some engine parts to rebuilt the engine of a 71' Honda SL100, I tried eBay and while there are some amazing deals over seas I keep hearing bad responses about it.

Any help will be greatly appreciated.

Have a nice day.