I gave my husband a tripod for his recent birthday and thought that a carrying bag would be helpful. I adapted Amy Butler's Nigella Yoga Bag, a free pattern, to make my tripod carrier. If anyone is interested in giving it a shot, I posted the measurements that I used on my blog.
http://duringquiettime.blogspot.com/ It really worked out quite well and I am happy with the results. Best yet, my husband likes it and is willing to carry it! That's always a plus!