D/H is now Grant, Dilling and Harris. I had DH meter box
doors that needed repair and GDH did not have replacement parts nor did they offer repair. You can google Dilling Harris and it will take you to the GDH site. You can get the phone number from the site. I'd guess that they don't have parts or offer repair. I like MEP001's post about candy machines. I don't think you'll need much space if only offering car care products. Black Jack tire shine, blue magic window cleaner, microfiber towels,
armor all original and cleaner, little trees (black ice, new car scent, cherry, vanilla and a couple others). My experience over three years is it is more of a convenience for the customer as opposed to a big money maker. Trying to make money with it, but mostly find it to be a bother. Will look at adding
credit card reader per MEP's post.