I feel somewhat foolish on this one, but will tell on myself in the hope that others may avoid the problems I've experienced.
I couldn't find a PS Mount bracket locally, and was eventually directed to the great online Jeep store, JWJeep.com. Not only did they have the major mount bracket, but questioned me on whether or not I needed either of the TWO other brackets on the PS Pump?? The JW Jeep technician was kind enough to email me a parts diagram for the pump mount bracket assembly.
There is another small bracket behind (toward rear of Jeep) the pump and a rather large eliptical bracket with two bolt guides in front of the pump. I was missing both of the other brackets, and I can tell just by looking at the long front bracket that it is intended to stablize the pump and eliminate vibration. The pump is mounted with a long moment arm on the primary engine bracket, and if allowed to vibrate with, say, a slightly out-of-balance pully, would fatigue the mount bracket right above the engine block attachment bolts. That's where both of mine failed.
Thanks to all who responded to my posted cries for help on this.