The young lady at our health food store hadn’t heard of it.
Diastatic malt powder is available in some health food stores as well as homebrew supply shops.
You can make your own: sprout a cup of wheat berries by covering them with water in a jar for 12 or so hours, dump out the water & rinse with clean water, and place the jar in a darkish, warmish, place. Rinse the berries every day with clean water and return to their place.
In 2-3 days they will begin to sprout. When the sprout is as long as the berries themselves, dump them out on paper towels, dry them off, and set on a cookie sheet in the sun for a day or so to dry out. Then put the cookiesheet in a 100F oven for an hour or three. Do not let the temp get above 130F or the enzymes will be destroyed.
Then grind the dried malted berries into flour, and use it in your favorite recipe at a rate of approx. 1t. per loaf.