Did you just buy a new bandsaw and it didn't come with a fence? Did you spend all of your money and really don't have it in your budget to purchase a fence system right now?
Building these two fences will take care of your needs for several months and you may even find you don't need a manufactured fence after using them. For just a few dollars in hardware and some scrap you probably have laying around they can be built with an hour or so of shop time.
The first fence I built to be used during re-saw operations where a high fence is needed to support a board as it is fed through on its edge. This fence could also be used for general purpose cutting but when it is close to the blade you won't be able to lower the guard down passed it creating a potentially unsafe cut.
The fence is made by attaching two boards together at 90 degrees with pocket screws. Next, angle blocks are glued and screwed in to keep the fence at 90 degrees. Last, a cleat is screwed to the bottom, no glue here, this will allow you to adjust the fence to the drift of the blade.
To use the fence place the cleat against the edge of your table measure the distance from the blade and clamp it down on both sides of the table.
The second fence is a piece of 2x2 poplar, 1x2 pine, and an MDF face. the 2x2 and the pine cleat are put together to form a T and a bolt, washer and nut hold them together; this allows you to adjust the fence for blade drift. Next, an MDF face is bolted to the 2x2 allowing you to micro adjust the fence closer to the blade by shimming it with paper. Make sure to counter sink the heads of the bolts into the MDF fence face.
I found that the one bolt holding the T of the fence together is not sufficient to hold the fence in the same position relative to the blade. If you put to much pressure against the fence when feeding stock through you will push it away from the blade. The best solution is to clamp the fence on both sides of the table like you do with the re-saw fence.