Unfortunately you can't, but you should be able to buy most of the items off the shelf in Finland (except the original cardboard box).

This page displays the contents of this years box with the contents:

http://www.kela.fi/aitiyspakkaus

Here's an infomercial demoing the contents: http://www.youtube.com/watch?v=PVPw2_A9V5Y

Lot of the clothes are from finnish company Reima, which have an online shop:

http://www.reimashop.fi/