I can not access that article is it a link about This book ? because its really rather good
Wouldn't be like a lozenge, but there are chewable Vitamin C tablets you can just suck on.
Cheap and easy: https://www.costco.com/kirkland-signature-chewable-vitamin-c-500-mg.%2C-500-tablets.product.100369190.html
Or a little bit more refined: https://www.amazon.com/Supplements-Vitamin-Orange-Chewable-Lozenges/dp/B000A0HCM4/
Avoid gummies, they don't last on account of the moisture in them. Best to keep Vitamin C dry. That's also why it won't be in a lozenge form.. to make a lozenge, there's a liquid stage.