Basket..... it turns out that sisal rope is hard to come by in
Singapore. Apparently the Army Market sells it, but it's oiled, and
that will certainly repel away my cats.
I found an industrial supplier at Commonwealth, but he quoted me
$160 for a coil. Basket, I might as well just buy a ready-made cat
scratching post. 
The good news is that corrugated cardboard is just as attractive
to cats as sisal rope is. Hmm.... looks as though I'll be doing
experiments at home later tonight. 
The rope... U can ask or prowl around industrial/factory
area...
There should be unwanted thick ropes around... but also most
likely have been oiled...
