Is There A Book that Can Teach Me More About Cagework Beadery?

I'm sure there are.   There are books about French Beaded Flowers and beaded embroidery.  Both styles have techniques that you can employ in doing cagework.

Two books that helped me more than anything, however, are The Jewels of Miriam Haskell, by DeAnna Farneti Cera, and Miriam Haskell Jewelry by Cathy Gordon and Sheila Pamfiloff. 

These books are beautiful volumes full of Haskell jewelry, many very rare pieces.   By looking at these wonderful pieces you get the sense of what might be done, and design ideas.  In the latter volume there are actually pictures showing how the jewelry was made.  These are very helpful.

Our Russian Goldplated findings found at http:www.bsueboutiques.com are the closest thing you will find ANYWHERE to the finish that was used on the old designer findings.  The old finish is no longer made because it employed chemicals that are no longer available to platers.  Our finish is a true goldplated finish as well, and there is a tiny bit of real gold in the mix.  About the only way you can tell it from the 'old stuff' is to compare, side by side, there is a teensy difference.

Our findings are sealed and should hold up to air and moisture better, over time, as well.  You should DEFINITELY try them.