Your best bet is to spend the money and get an AMS retriever. At $15 to $20 an arrow you will have paid for the retriever in just 4 or 5 lost arrows. Most sporting goods stores lack a wide range of bowfishing supplies. Take a look at bowfishing shack or bowfishing extreme online. They have great prices, are usually cheaper than a local store, they have just about everything you can imagine for bowfishing and the ship within a week.
Great job on your first one!