How about a ss strainer? Cut the handle off, drill a hole for the tube and add a clamp to hold it down with the tube. You could always add mesh to the bottom if hops were sneaking around the base.
You mean a common kitchen bowl style strainer? I guess I just never seen one with a fine enough mesh. If I had to guess, the mesh size is commonly about 12 x 12 or 12 holes per inch. It would be dandy for whole hops. The trick would be making a hole that doesn't completely unravel, perhaps by trying to reweave the cut ends back into the mesh.