Looking to buy one in Taipei. Any ideas?
You tried City’super? They have a range of odd (and expensive) kitchen utensils
Aw, shucks.
Actually looks like a nail file.
Why not use one of those?
Looks like something you could make with any tool handle and a grinding wheel. 
true seafaring men use butter knives. harrr!
Turns out Daiso has them, a mere NT$39 and they come in three colours at that…