Samuel,
It is not a T-6; those brushes will not fit. If you'll check the serial number on it and let me know what it is I can try to help you out.
A little background on that machine: I don't know how old she is until I check the serial number, but I'd say she's at least 20. It is not one of our official commercial cleaning machines; it is a rental model. I suspect this one came out of Canada? There is a group there that purchased some of these a while ago, and they're the only ones we've ever sold this model to. Other machines of the same model that you may see are leased out by us and are still our property. Because we still own them, we do the maintenance on them. Thus, we've never sold brushes for this machine and they are not available through distribution. However, since this is probably the only time in the history of the universe that this could come up, I'll see what I can do for you. Like I said, give us a call (800-558-9439) or email me with the serial number. (If calling, be ready for the customer service department to be confused and tell you we don't have brushes for that. In which case tell them that you know it's a weird situation, but Greg said he'd work something out.)
By the way, the is a great machine for residential stairs.
A note to folks looking on ebay for HOST machines: if you get a serial number from an ebay seller (before bidding) and call us up, we'd be happy to tell you what we can about it.
Regards,
Debbie