Interesting to hear that you still have it there. Up "here", they tell us the industry quit selling it as TSP. We used to use it much more often than Dap, however most like the cheap N in dap. Problem is, if you're putting it in front of beans, the N is just wasted. They told me there was no market for it. We occasionally find MAP @ dealers also.

I'll assume dealers just want to stock 1 product & go ahead & offer the more expensive DAP that covers P & N needs.