So the SSD1327 grayscale display that I found on aliexpress.com is parallel only (8080 protocol). The chip itself is able to talk I2C and SPI as well, but the protocol select pins aren't broken out on the cable. Since I've ordered a display before I realized that and now that aisler has free shipping I designed a breakout anyway. Also on the board: a 15V step-up converter based on the MT3608 - that converter you get when you search for "12V step up" on eBay and sort by "price+shipping lowest first". Plus my new logo design :) I need a different micro controller for that.