Thanks to kaipanoi, bac9's amazing B9 Aerospace is available for .23.5. However, many part files were not configured correctly. Now every original part is accessible. The only thing I was unable to fix was the S2 cockpit IVA.
Redistributed under the original license, which is the:
Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)
http://creativecommons.org/licenses/by-nc-sa/3.0/deed.en_US license that states:
You are free to:
Share — copy and redistribute the material in any medium or format
Adapt — remix, transform, and build upon the material
The original author specified this license here: http://forum.kerbalspaceprogram.com/threads/25241-0-22-B9-Aerospace-Pack-R4-0c-New-pods-IVAs-engines-fuselages-structures
Which is the official thread that is linked to from the original spaceport page here: http://kerbalspaceport.com/0-20-2-b9-aerospace-pack-r3-1/