For trevors, try my el cheapo favourite the aussie outback corroborree (sp?) chugger. They're basically the cheapest popper out there. Sell for about 4 or 5 bucks in kmarts and big ws. They're a bit big for your smaller popper-caught species but are perfect for small to good sized trevors and anything else willing to slap them off the surface. Best thing is they are quite heavy and far casting for their size, making them fantastic for land-based fishos like myself. And for my money, they pop far more reliably than some other cheap poppers (SURECATCH!) beacuse they sit flat on top of the water, not bum down. For mine, the only drawback is their trebles can be a little weak, but put too heavy a treble on there and it can unbalance the lure. Hope this helps.
Joel