Proamerica Tools, Baldwin Park, California currently offers only pliers in its product lineup.
They are not really concerned with sales directly to the consumer, because the great majority of their product is made for private-label accounts (Tekton, Proto, and others.)
KAL Tools is essentially one and the same company, but KAL is now strictly government/military contract stuff.
The Proamerica wrenches (and most of the socket sets) that you'll find on Ebay are generally military surplus.
As far as product quality, I picked up a set of Proamerica short-profile double-end metric box wrenches a couple years ago, and they appear to be pretty well made - fit and finish isn't as snazzy as a Snap-on or an S-K or an Armstrong, but they'll get the job done.
If you are searching for a particular item on Ebay, search both "proamerica" and "pro america" - because of the way the name is stamped on the tool you will find listings both ways.