Just wondering, what is the latest file number on your picture? I have only reached about 8k counts of my shutter, but never had considered changing the shutter as I only believe it'll break when it wants to break.
So, give no more thought about it, and continue shooting till it finally break! That may be many more years in future or touch wood, maybe tomorrow? If it does, Canon Service Center is at Harborfront, which is easily accessible by bus, mrt, or even taxi.
Cheers!