There is the Aquaris M10 HD Ubuntu Edition for €259 or the FHD edition for €299. Prices are the same as the Bq Android version of the M10 but exclude shipping. Besides the better screen, the FHD version has a 1.5GHz Mediatek SoC rather than 1.3GHz but the other specs are the same with 16GB of eMMC memory, 2GB RAM, microSD slot, and 8MB rear camera.
The current pre-order prices include the tablet, cover, and screen protector. Deliveries on the Aquaris M10 Ubuntu Tablet are expected to begin the second week of April. You can pre-order the tablets here and here.