Sorry I took so long to get this out.
Here's a zip file containing the raw versions of the main background for Shinigami Blue.
The zip file includes:
1 flattened .png
1 flattened .psp
1 Macromedia Fireworks file
1 Paint Shop Pro File
1 Adobe Photoshop file
EDIT: Thanks so much to babaca for converting these files to Paint Shop Pro format for me!