No problem Launderess, myself when I looked at these shops I used to get heart shaped eyes at firsr, but when I found out how they worked I was very disappointed.
Besides, prices were actually so cheap and too beautiful to be true.
I recall a website named dollardays...but once you find one Google suggestions via image search puts out so many.
As a source for Mexican detergents I used to buy in online latin shops, specifically I remember one in Georgia,in Marietta.
They had many ones and also ones you do not find so easily in USA such as Viva from Henkel.
I don't know if still exist, but latin shops online are the best source.
Also it appears that you can order them at Walmart too now.
But I remember you are not a fan of Walmarts.