where would be a good place to start looking? recycling places? arts and crafts? home depot? Im just looking for something rather cheap.
Try PVC piping hard to find it in clear normally comes in white/grey but this am sure will do it you. Good luck
The only place I can think of would be an aquarium supply store. It won't be cheap though. You might also be able to find it at a store that sells waste collection set ups for woodworkers.