Online Community of Zenith Builders and Flyers
I thought William Wynn has them. They're on his list.
Check with Dan Waseman, if he does not have them, go the ebay route;
Search ebay by "corvair cylinders baffles" for more options of the same.
You can get them at Azalea Aviation locates in Adel, Georgia Richard.
Check with Clark's Corvair.