Where is the best place to find info and parts for these. So far I've looked online and haven't found much for the 2015. Any insight would be greatly appreciated.

 

Well, what info are you looking for? I think they upped the power a bit this year. They have upgraded shocks on some over the years. A little different plastics and such but pretty much any review or info on any year 700 will give you a good idea what they are about.

 

I would hope a 2015 would not need parts yet.

Here is a very detail spec chart on a 2015 700 Raptor 2015 Yamaha Raptor 700 Reviews, Prices, and Specs they also have a 700R, I'm not into sport ATVs and can't tell you what the difference between a 700 and 700R would be.
One has reverse maybe?

 

The R has upgraded shocks. Worth the investment if you ride hard, do long rides, or want to adjust for extremes like slower trail rides then switch to jumps or dunes, etc. Unless you are planning on buying aftermarket shocks, then the r may not be worth it.

And by parts, I figure op may be looking for hop ups and accessories.