I've heard that the plates are interchangeable with Honda CR125R plates too, but I don't know for sure--the clutch in my '01 CR125 has held up great, haven't had to replace it yet.
Beside OEM replacements, I know that FBF makes a set of aftermarket frictions that replace the inner 5 (of the 7 total) stock ones. They also make a CNC'd billet clutch basket too.
If you think you'll need another clutch, why not just get it ahead of time and bring it with you? That way you're assured you'll have it and you're gonna need one eventually anyway.