list of spring rates

Is there a list of spring rates by manufacturer (OME, Toytec, Ironman, Eibach, etc)

I did find this link when searching but is limited to only a few:

http://www.tacomaworld.com/forum/suspension/215083-spring-rates.html

Basically I am looking at the lowest spring rate coil out there that I can get a full 3". I currently am running OME 885 with the .5" spacer and Dakar rear leaf pack and I am level.

Seeing what my options are on the front to soften it up a bit but maintain lift. I do mostly crawling and every now and then desert.

I think OME 885 per the link above are 590 I thought they were 580.

Looking for a thread if it already exists before I go making calls and searching multiple pages.

 

884's and 885's are 590 lbs per page 121 of the guide ( as are 887's )

http://www.arbusa.com/Uploads/PDF/onlineManualsGuides/OME_Guide_current.pdf

 

perfect. Thanks it is sounding like the OME offer the lowest spring rate.