from Turkey, sir.
You will find a lot of information already available for (pretty much) every question you have in mind. And if you can't, people are always here to offer any information they have.
IIRC, an Aurtralian producer had high quality rad guards available. I'm sure locals will direct you there soon.
As for luggage options, there are threads already available. Join in the conversation or start yours and I'll be happy to add my two cents.
Enjoy your ride, like the rest of us do