Thanks largely to this video I now have gigabit ethernet from the router to my iMac. I picked up a punchdown tool, couple of face plates & keystones at Mongkok Computer Center couple of weeks ago, right before the Typhoon 8 hit actually.
There is a shop right outside the 3rd floor that sells networking parts, amongst many other goodies. I paid less than HK$100 total for the lot. (photos after the break)
Here are photos of the goods. The keystones are CAT5e-rated and my cable is also CAT5e.