I wanted to buy a nice round bale net too, but didn't want to spend that much money on something that was going to get holes eaten into it, or have it destroyed after just a few uses.
After looking around and checking into buying netting and making one, I came up with something fairly cheap, about $30 and after the 8th bale, it is holding up really well and saving quite a bit of hay!
(My critters are horrible about tunneling into the bale and tossing it everywhere.)
I will eventually buy one when this wears out since now I know how well a bale net works, but so far, the one I made is showing no signs or wearing out any time soon and stretches the bale an extra 5 days or so with very little wasted.
Here are a few pics and if you are interested I will let you know how I made it.
The first gives you an idea how I stitched it together with small slow feeder hay bags, and the second pic is how a bale looks after five days.... when normally it is destroyed by then.