I've sold quite a few of these on the SAAC Forum, was able to find and make two more, thought I'd offer them here as well.
Made from ~55+ year old aftermarket NORS filters with the correct thick nut, IMO likely made by the same supplier as the original C5AE Rotunda and Autolite filters, these are about as hard to find as NOS. Most of these donor filters are yellow zinc dichromate plated, the first step is to chemically remove the yellow zinc. Next, the Rotunda logo and C5AE-9155-A4 engineering number are paint stamped. Assembly line correct for all 1966 289 cars including HiPo and GT350, includes NOS gasket. $70 each which includes USA shipping.
Please PM or email if interested.
Thanks,
Dave