Guess I'll have to share some with ya, huh? If I get a new stash, I'll mail you some. I bought all the store had, just 4 jars, but I haven't gone to another HEB to find more (yet). FReepmail me if you want me to.
BestMaid has a website for ordering their mayo and some of their pickles (I was delighted to find out they also own Del-Dixi, excellent pickles) but doesn't even mention the "sandwich spread" at all! And the word "Brockles" never comes up, either - but it's as close as it can possibly be to the same thing.
I believe it's listed as Dalton's BestMaid Products online.
This page at the Best Maid Products lists a sandwich spread.
Maybe it's the one you found.
http://www.bestmaidproducts.com/products/