Soryy I can't be spacifically of help - I have boys LOL, but what i used to do when couldn't find the stuff I was looking for was to buy plain clothes then get iron on transfers - from ebay or trademe(from nz). You can buy them for dark or light coloured clothes and so easy to stick down. I even did pillowcases for the boys.
This option is far cheaper for stuff that they grow out of so quick anyway.
Have you done a google search to see if anyone stocks the items you are looking for??
Anyway, hope this has helped and good luck smile
Julie + Rodger = Mackenzie 04 & Kristain 06