I'm a little confused on how replacement parts work - how you find out if they are available and how to order them.

I need the following items that orignially come with the dolls such as:

Josefina's blue hair ribbon
Kirsten's amber heart necklace
Kirsten't orignial striped socks

Well I know the necklace comes with the accessories, but of course I'm not going to pay for a whole new accessories set! I really miss it though!

And one other question:

The chalk I have for the school sets for Kirsten and Addy is broken. Does have a little method for finding/creating doll-sized chalk?