Shift-click to buy

[bsmorgan]

In my garrison trading post, there is a vendor that sells various crafting reagents for garrison resources. At most other vendors, I can shift-click to enter an amount to buy but not with this vendor, If I want 100 Raw Beast hides (vendor sells 5 at a time), I have to click on the item 20 times plus click on the confirm 20 times.

I know I can buy more than 5 at a time because I got Skillet's shopping list to do so, but the process is complicated (the toon with the excess garrison resources is not the toon that needs the raw beast hides).

Is there an existing addon that can do just this simple task?