Finally found 20 Mule Team Borax
Out of four Walmart stores in my area, only one carries 20 Mule Team Borax! I'm not sure why this is so. I went to one yesterday which is not as convenient to my home as the others, and it was on the shelf there. (of course -- reminds me of Murphy's Law)
Anyhow, the Great Search is now over, LOL.
Now to see how it performs in my washer. That will be the acid test. I used it years ago and loved it. One great thing about it is the low price. If it doesn't do a great job, I didn't waste much money.