The old style Wico joysticks (both microswitch and leaf switch), are both out of production.
But they were both VERY common, and they hold up very well. I have a 20+ year old one installed in my Kangaroo, and it is STILL in great shape.
Look for them on ebay. To spot the microswitch one, look for the telltale red balltop, along with the off centered rectangle on the bottom, and microswitches.
The leaf one is a great all around joystick, while the microswitch one is probably the best "precision" joystick around, very firm, smooth, short throw, very exact, nice and clicky, and they neither favor the directionals nor the angles.
The leaf one is not as good as a fighter stick because of the imprecise nature of leaf switches themselves. Basically, leaf switches move and bend over time, and thus you can't always count on the corners, etc being exactly where you expect them to be, and being exactly the right size.
The above ONLY matters for fighting games, and it really doesn't even matter that much for them. I only mention it because every leaf joy is going to be ever so slightly different when it comes to the exact spots the leafs activate.
I myself STILL use Wico leafs for fighter sticks anyway. They are still the best joystick ever. Plus I always use Chun-Li and her moves are easy (at least the two I know are).