Thanks for your kind replies.
I've been to klipsch local dealer again.
They said they could get the tweeter for me.
But they needed to order a pair of them not single.
Plus, including shipping cost, the total cost would
be very high. I guess buying new speakers cost less.
The local dealer suggeted me to fix it instead.
I've found a good audio repairment shop which can
fix almost all audio parts. They told me they could
replace burned coils inside the tweeter but they are
not so sure about the sound quality of recoiled one.
I am wating for the repaired tweeter now.
Thanks a million.