Jeff zone 8 N.C.

Well you and I definitely have the fever bad. Over a year ago I drove (If my memory serves me) 300 miles round trip to buy Turface MVP that looks to be a similar size to PR-Giants medium although I think it is coarser. 50# bag $18-$19 but it seems worth it. You might try to find "paver base sand" from a brick/block/tile supply. I think Home Depot sells it too as well as other building suppliers. You probably need to find out it's PH first just to make sure it's near neutral. While on a job last week I saw some and it looked perfect for a well draining sand but have not checked it out any further. It was finer than my Turface MVP but looked workable and is made for good drainage under things like driveway tiles.