i think every online store that sells lenses have this kind of lens for intermediate and close vision. The only difference is that some og the online stores call them degressive computer lenses, degressive lenses,computer lenses or occupational mid distance lenses.
you can choose any online store and the easiest would be to call them and ensure that they have this kind of lens.it is better talk to them directly because this way you can fill the questions they may ask about your presription, or to refine your preferences.also. Every online store usually has a call center that can handle your order directly.
Nearly every online shop offer the lenses that cover intermediate and close range. However, I do not know if there is a online shop which ONLY offer lenses covering intermediate and close ranges.