Think it might be more than just the 2610 model ... I sent my BMW Nav III back for refurb beginning of May due to a touch screen issue, only to get a return phone call from the service dept that they no longer refurb that model.
Telephone support weren't aware of that mind you, as I'd had multiple contacts with them via email and on the phone during the preceding weeks.
So, looks like any of that form factor are now on their own (26xx, 2720, 2820, etc) ... keep them safe (or find alternate sources!).