If anyone's interested I've also got one set of new 2nd gen S10 (94-04) rear battery box frames and boxes left from inventory. The steel frames are powder coated gray, the 14 ga steel boxes are powder coated black, and the boxes are lined with 1/2" thick black expanded polypropylene foam insulation/cushioning. Here's pics of a typical installation. The two side boxes (behind cab) hold four GC2 size batteries, the rear box holds eight batteries.
This is the last of our EVS hard components. All of the under hood frames, boxes, and parts and tilt-bed parts are gone. Not sure how I ended up with one lone set of rear frames; we built these six sets at a time, I must have mis-counted when cutting stock
Only other items left are the thirty adapter/coupler digitized and solid modeled designs I have in Solidworks and I'll keep them as a package.