Normally you can find knox in your grocery stores. Out where I live, it's stocked within the gelatin aisle.
Aquanet at any drug store. However, the products where you live might be different (no aquanet, etc). Give other brands of strong holding a shot and see what works best with your hair.
I know my stores and similar stores in the area (like walmart) stock aquanet near their other hairsprays that don't quite have a full product line, (so it wouldn't be cut into a garnier or pantene planogram) but with the hair styling products.
Rave might work out, too, if you can find it. But my browser isn't loading pictures atm, so I don't know what you or your hair looks like, either. haha.