foliar feed acidifier

I had my soil tested for PH and even though I have been putting sulfur in the soil every year, my soil is still 6.9 and 7.2. I will put it on again this fall and rototill it in but I need a feed that acidifies now. Any suggestions?

Foliar feed like you say in your subject line won't do anything to acidify the soil. What are you trying to grow that you need the soil acidic? The pH that you have there should do fine for most types of plants, and if your soil is so resistant to going to an acidic pH even after you've been applying sulfur, then you're going to be fighting a neverending battle so personally I would choose plants that will be happy at the natural pH of the soil.