Nothing else feels quite like a Wico leaf. I have a few used ones I could sell.
A Happ 49-way uses a grommet, and has round restriction (no corners), but the feel's definately different. They're on sale from Happ through the end of the month.
Hmm, actually, a Monroe joystick feels pretty close. They use a ball-pivot instead of a grommet. Monroe's have a really short handle, though, so you would need either a metal panel or to top-mount it. I think Nostrebor has one for sale in the Buy/Sell/Trade forum.