Amazon has zinc quercetin C and D3. In 1 capsule. Just got it.
I buy my supplements from Swanson Vitamins.
I don’t think you can get it as fast as from Amazon, but for someone who wants to plan ahead, they sell good quality stuff for reasonable prices.
And they are always having specials or sales, so no one should buy anything from them full price, especially their brand - the Swanson label.