I got mine online. There are plenty of sites to get it from. I got mine from Peaceful Valley, but even Amazon has rolls listed.

My plants were all panted in a 6 x 6 square plot and they got over run with grass so I pulled them all up and transplanted them into the row. As they have put of runners I have planted the row to the left. I am seriously in need of another pruning of runners as they are all rooting willy nilly...