WeaKnees (through its website
, Amazon.com storefront and eBay listings) sells a version of the TiVo Premiere remote control customized for Charter Cable (whose rollout stalled, resulting in a surplus).
Aside from the "Charter HD" logo, the only difference from the standard model is the addition of an "On Demand" button. Several TiVo Premiere owners have confirmed that this button is functional under Comcast (i.e. it loads Xfinity On Demand), but I've found no mention of this in reference to the Roamio line.
If a Comcast subscriber using this remote control with a Roamio/Roamio Plus/Roamio Pro DVR could comment on the button's functionality (or lack thereof), this would be very helpful.
Thanks in advance.