A great DIY hood is plastic mesh and report binders. The mesh is at craft stores for really cheap and the report binders are at walmart, grocery stores, dollar stores, etc etc really cheap as well. Cut the mesh to fit your tank then cover the edges of the mesh with the report binders to give it a "finished" look and add a little weight. You can cut the mest to incorporate a filter or a light and it lets a LOT more air in than your regular hood. You can make a tab to pull the top off using more of the plastic mesh and just glue it. For a 5 gallon tank all this would probably cost you $3... no kidding.
I think it looks really nice.. but if your like me and constantly set stuff on your hood your going to want something sturdier LOL.
I tried to find you pictures but couldn't find any on google :( It sounds messier than it actually looks.