I make jigs right on the spot using Aeroflys. Cut off all foam, trim back tube so as not to cut wraps holding it together and slide it down your leader. Add a splitshot, your choice of sizes depending on water...Thats the beauty, you can vary sizes and weight depending on your situation. I know that Aeroflys are kinda spendy but you may be able to get them in Bulk. And there still cheaper than a bought steelie fly from a shop or even cheaper than a jig bought retail usually.

Bob D