Just using a cheapo ebay kit. The stick is 4 micro switches as up down left right. Cost about £20 but works fine so far. Good thing is the parts match the genuine stuff in terms of sizing so if I feel the need to upgrade it's easy enough but to be honest as is it's fine for me. Handy thing for the ebay kit is you get all the wires for it's usb interface. Just cut them off and solder up to the amiarcade32 and away you go.
The current one works great for beat em ups, in particular the likes of fighten siprit. Shooters like project x and banshee are also great on this.
Edit: this is the ebay kit I used
https://www.ebay.co.uk/itm/Zero-Dela...MAAOSwWfda60Br