Sure! Actually, I got the panels locally here:
KC Store Fixtures . They had better prices than I found elsewhere, and the delivered it free. I don't have any idea what shipping charges would be, but these are heavy; 3 2ft x 6ft panels together weigh 60lbs.
The tent held up awesome and didn't budge an inch. I filled up the sandbags that came with the tent with 30lbs of sand each (I had an issue with trying to get PVC home in my little car) and then bought a large, flat gray brick that weighed maybe 20lbs and put one of those on top of each of the sandbags. I was not messing around this time!!!
Like I said, the gridwall is heavy, but in case of winds I wonder if you could tie the tops to the bars of your tent? If your tent is sturdy, I bet that the gridwall would be pretty difficult to knock over then.