Where can I get CiA 302, CiA 304 and CiA 305?
May or may not be : 

305
http://www.elmomc.com/support/manuals/MAN-CAN305IG.pdf

304 online
http://www.softing.com/home/en/industrial-automation/products/can-bus/more-can-open/framework-dsp-304.php?navanchor=3010660

Maybe here - free signin
http://www.softing.com/home/en/industrial-automation/downloads/drivers-demos.php?T=4&amp;G=2&amp;P=1