looking for water storage tank

[Myka]

I'm trying to find some in the same size. I'm looking for the heavy duty white food grade ones that you see at vineyards and such in a rectangular "space saving" shape. I would like to be able to make a little wood holder for it with wheels. I have been asking around fro a couple months now, but have not been able to find a source. I'm wondering if these bins are something that vineyards are able to obtain by wholesale only and they are not offered for retail since they have such a specific purpose. Currently I am using Rubbermaids, but I find them flimsy and too small.