PA6B... aka cheap and cheerful from AliExpress (which is actually a good place to pick up cheap Chinese components if you don't mind a 3 week shipping delay, often cheaper than Ebay, equally lacking in documentation, but worth a look!). I got some ST7735 driven displays and some RFM22B radio RX/TX units from there too, and all for "throw away" amounts of money. It's not so distressing if you toast something when it's cheap... which was a lesson I learnt last month: Beer + wiring new toys (backwards) = stinky and annoying.