Gunner have you tried river basin sports near the catskill creek?
Excuse my ignorance on this topic but don't these umbrella nets from memphis nets
look like a scap.
Suds the HR guys lure the herring into a square net (scap net) with something called a stoolie. One angler tosses out a live herring or shiny facsimile and reels in towards the net. Herring trail the stoolie and when they get close to the net , the operator lifts it and 'voila'. Herring. Its also a one man operation but takes a bit of skill.