Check out my restoration thread on how to modify the versatile Happ base unit to use in your Aztarac. You can use any modern Happ stick/yoke/fisherman's bait/etc stick off eBay and convert it. They all share the base unit. Kudos to Happ, this is a well engineered mechanism. Important that the shaft has a bend to account for the slanted CP. A straight shaft will cramp your wrist during game play.
Here we go. Last of the 4 sisters to be restored.....Aztarac. Just like the other sisters she's been sitting for many years....waiting her turn. I'm starting with a survey of what needs to be repaired...restored...replaced. Taking a lot of pictures and notes. Thought I'd try my hand at...
forums.arcade-museum.com
Here are the conversion parts to order from Happ. You'll also need the optical encoders called out in my thread.