Look up thenetshed on ebay
. Make sure to call her and ask for used fish netting that is thick (as it is not always listed on line). She usually sells it for about $6 for a 5x10 feet section plus shipping. Get some zip ties and make your own.
It does have a salty smell, but not really fishy and you could probably throw it in the wash machine if you were concerned.
I've bought from her 2x now - I have 2 hay nets that last about 12 hours when filled, and a round bale hay net. Just make sure to call her in person- the online pictures are misleading in size of the actually netting.
None of my nets have degraded in over 2 years of daily use.