Awesome to see the pics Ken. Great stuff. Wish that was my 130 in the pics!
As for a sealed alternator, there must be something out there. These engines are used in all sorts of off racing machines including baja trophy trucks so their must be someone (I'm assuming in the States) making a sealed alternator.
The sealed alternator (water cooled) for the Toyota 70 series is a nice piece of kit and might be modifiable to fit the LS3.
The A/C compressor looks like a bit of an afterthought.

