I'm interested also - seem to be the most highly regarded brush.
Just ordered a bunch of stuff today from sleevetown (sleeve city), and resisted their Mobile Fidelity Record Brush.
Looked for best deal on Disc Doctor brushes and found $20 each was best deal.
Ran out of time to pull trigger, so if a better deal/item is available I'm there.
I have a Groovmaster Label Saver and wash the records manually. The brush that came with this looks like it has natural fibers which won't go good with the Phoneix cleaner with enzymes I just ordered.