If your lawn is doing OK, then I say it's really not that bad. The proof of the pudding is in the rooting, you might say. Maybe those soil nutrients that become less bioavailable at high pH, happen to be abundant in your soil, or maybe you have a crack team of mycorrhizae taking care of things behind the scenes.
Composting conifer waste (maybe Christmas
trees? a no-turn pile can be built with loppers really easily, and can be sifted after six months or so) to spread on the lawn might help bring the pH down in the long run, and so would the general advice Paul's lawn article offers on increasing organic matter content.
If you need a lot of gardener's sulfur, you might try a
feed store.
"the qualities of these bacteria, like the heat of the sun, electricity, or the qualities of metals, are part of the storehouse of knowledge of all men. They are manifestations of the laws of nature, free to all men and reserved exclusively to none." SCOTUS, Funk Bros. Seed Co. v. Kale Inoculant Co.