Has anyone checked this one?
http://www.bax-shop.de/icon-istage-midi-drumpad-weiss?gclid=CjwKEAjw-abABRDquOTJi8qdojwSJABt1S1ON8wuPKMRUWgeXNaiI-f-BemGRAJio9JAxrQkS4X3wRoC-3Lw_wcB
could make a great sequencer for 25 bucks but it has a built in usb hub, so maybe a reason not to work with axoloti?