If I can suggest a possible solution that I used to get very close hoses, you may want to consider browsing through the Dayco site (
http://www.daycoproducts.com/) and visually you will be able to set the parameters for the hose (use this link to start:
http://www.daycoproducts.com/online-...1?part_type=10) add in the parameters and from that you can view the photos and measurements that correspond. I have a local parts supplier that has worked with me on sourcing mine and in the end I found a real close fit for the Rad hoses. Be patient and you will find that great match for sure. Once you have the product ID# you can then source the corrugated equivalent or racing equivalent.
This is the top hose I found this way.
Attachment 97085