I'm about to fly from Istanbul to Seoul and I have a useful amount of Turkish Lira (
TRY) left but I don't have any South Korean Won (
KRW) to pay for the metro to my hostel when I get there.
Several times in the past I've ended up being stuck with currencies that are very difficult to exchange in the country I've arrived in.
Can I buy
KRW at the airport in Istanbul?
(I've also asked the reciprocal of this question, since Stack Exchange questions are meant more for the long tail than just for the original asker.)