If you want I can link you to these files. :)
I would love to have the link... thought it might be hard since I've lost my arms in battle :)
Master robin? Is that you? :P
I'll see if I can upload it somewhere.
Edit: here you go. :) http://www.mediafire.com/download/v9ncy452yzy3evn/Spore_12k_Creations.zip
I also just realised that this "backup" was made by somebody else. I found some downloads on my pc from where I compiled this backup. The only difference is that this download probably includes a few my creatures and buildings from my own collection. Just add everything to Documents > My Spore Creations.
The original creator of this collection wrote the following:
"This pack contains.
All sorted in folders. You may have to restart spore a few times. Since spore mostly just adds 500 new files each time."