Amazon offers its Prime members the TiVo Roamio Slide Pro DVR Remote, model no. C00260, for $37.99 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $6.47.) That's the lowest total price we could find by $6. Designed specifically for TiVo Roamio DVRs, it features a backlit QWERTY slide-out keyboard and search and back buttons for easier navigation in web apps. Two AA batteries are required (included).

Note: It's expected to ship in two to four weeks.