I just ordered some yesterday for my run. Got it on Amazon (36" x 100' - 1/2" mesh - 19 gauge) for about $106.
https://www.amazon.com/gp/product/B015PD9L56/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
There were cheaper items on Amazon, but the reviews pointed me to this one...also got the...