You could try the Treehouse range at Indigo (used to be Banyan Tree) at Repulse Bay or Ap Lei Chau. The range is shown at:
http://www.treehouse.net.au/
You might also find that as long as the sheets are 100% cotton and good quality, they will be softer after you wash them.
Just a note on the cot bumper, personally I wouldn't buy one for a new baby because of the risk of SIDS (Sudden Infant Death Syndrome). For more information see:
http://www.sidsandkids.org/ , particularly:
http://www.sidsandkids.org/pdf/safesleep.pdf
Hope that helps