Ask HN: Power adapters withconnector with2.5mm OD and 0.8mm ID for Chinese tablets?

Full title: Ask HN: Non-generic power adapters with barrel connectors with 2.5 mm OD and 0.8 mm ID for Chinese tablets? Also posted here, where it’s a bit easier to read due to lack of footnotes and the convenience of inline images: http://hardwarerecs.stackexchange.com/q/1522/1221 (Hardware Recommendations Stack Exchange isn’t exactly frequented much though, which is why I figured I’d try asking the HN community since this is kind of a specialized question). EDIT: Well… seems that HN has a character limit of 2000 characters which I managed to exceed. Instead, I’ll only post the questions I posed at the bottom of that link here. There’s a lot more helpful context in the link above though (including why I’m asking this and all the searching I’ve already done), so it may be preferable to read it there instead. Anyways, here’s the bottom of that question: This leaves me with two options: 1. I can buy a 2.5 mm OD / 0.8 mm ID barrel connector to USB connector cable like the one I linked to (despite not specifying the AWG of the cable, it seems like others have gotten it to charge their tablets fine, so it may be good enough), which would then make my question: are there any reputable (non-'no name' brands) that sell a USB power adapter that supplies an output voltage of 9 V (DC) and an output current of 2.5 A? or 2. Buy a power adapter that already has a 2.5 mm OD / 0.8 mm ID barrel connector on the other end, which would then make my question: are there any reputable (non-'no name' brands) that sell a power adapter that has a 2.5 mm OD / 0.8 mm ID barrel connector on the other end of the cord and supplies an output voltage of 9 V (DC) and an output current of 2.5 A?