My bet is that you will find many books that discuss different suspension designs from a conceptual level. They may even point out some of the benefits and drawbacks of different designs. But, most books will be written from the perspective of road racing cars, circle track cars, or maybe dirt track cars. I don't know of any that even attempt to correlate that information to a long travel off-road suspension designs.
As for the various designs of a-arms, the possible designs are limited only by your imagination and the configuration of your vehicle. There is no right or wrong design. There are however, conceptual designs that work well and have been modified to fit hundreds of different vehicles. As for the jigs needed to construct repeatable results, the key is to fix the location of all key points on the jig such that they are accurately located and positioned for your design. The jig itself can be made very simple or very complex depending on your needs and what you have to work with.
I guess I am assuming that you already understand suspension geometry and you have your design parameters clearly defined. If not, you should start there because the design of the a-arms won't mean much if the suspension doesn't work. If you need an exact blueprint for all of your a-arms and their jigs, the steering will probably be the next thing you will need help with. Maybe you should consider paying a qualified fab shop to do the work for you. See the linkz section or the banner ads at the top.
"The only source of knowledge is experience." - Albert Einstein
