Are you handy? You might want to pull the shift lever and remove the left side cover. If you don't want to drain the oil you can lean the bike to the right so it won't flow out.
I suspect things will be ok in there but I think the shifter rod goes through to the right side where it engages the transmission. There was a thread sometime back where a guy and his daughter were on a trip and the shifter went limp. The engaging lever at the end of the rod had bent. Some nice guys in a Harley type shop opened it up, diagnosed it, bent it back, and got it working again.
If you don't want to probe the depths yourself I'd say find the nearest independent old bike shop, preferably Brit bike but Japanese is fine too. Talk to the oldest, scruffiest, crankiest mechanic there and see if he thinks he can help.
Scott