HCA: Hermit Crab Association

Im looking for some kind pf fish net fpr climbing.... Where can I find them at? Looked everywhere!

I have 5 crabs and have no idea what kind they are since I am still new about them and had them for 4 months and very very glad I researched on internet how to take care of the crabs as soon as I got home from Florida bec they would be dead for sure didnt know they required humidty all that so..... ...