I have a set of Soft Brushes and a set of Hard Brushes and a set of Drive Plates for Scrubbing or Encapping.
All are in excellent condition ............I've held onto them for a while in the hope of acquiring a Klanz but have been outbid on three occasions.
I'd consider a swap for a lightweight extractor or something like the Solutions Vac Booster.
I also have an old but working Holloway machine ( similar to the Mini Tex in design but maybe a little heavier ) with a soft and a hard brush. It can deliver dry foam directly to the working area and is ideal for pub type work where there are areas of bench seating. I would be happy to add this to the above.