you're welcome mate!
they have small dust deputy type one for use with a shop vac- right up to big 5 hp models.
you can get the plans for free and build them- or buy them in various stages of completion, from kits to partially built etc.
i have discovered ( by reading and reading and reading) the key to these dust extractors is all about the geometry, the sizes, angles, hp, pipe size- drag co-efficient etc, are absolutely critical.
just taking a 5 gal. bucket and putting a hose in and a hose out- just doesnt cut it!
good luck mate- keep us posted.