On a whim, I ordered a couple USB-C chargers from the G01/G05 I found on eBay for about $30 (just checked, more available) part number 84108711940. 940's just charge, there is no provision for a data cable, and they charge up to 3A. 84108711938 has two USB-C ports per module, if you are so inclined. If you are curious, USB-C ports can be found on the backs of the front seats on G01/G05's with SA4FL.
Well, they are a perfect fit under our rear climate vents! Wired up to ACC power from the glove box; backlighting and ground is already there at the cigarette lighter, and hello 2019!
They take the standard flat 4-pin connector, part number 61138380696, slightly modified. I had to file the edge a smidge so they would fit. You can also find the 4-pin connectors on our rear window switches, and on E39/E38, etc. I clipped some pigtails at a local Pull-A Part for $1.50. Below are the pinouts.