Same here. Not grocery stores, but my local Orchard Supply Hardware usually has them, especially in canning season.
These “pint and a half jars” have straight sides and a lot of capacity.
https://www.amazon.com/Ball-Mouth-Glass-24-Ounces-9-Count/dp/B00B80TJLW
I actually have 6qt and 8qt - primarily for cooking.
I can fit 3 quart masons in the 8qt IP.
I prefer these slightly smaller 24oz widemouth jars… that’s just me - https://www.amazon.com/dp/B00B80TJLW, Also fit 3
http://www.amazon.com/Ball-Jar-Wide-Mouth-Bands/dp/B00B80TJLW
24oz Ball jars will work.