Suction Covers for spas before 2009 +  can be found on eBay by searching for part number 01510-559.

Used on spas beginning in 2009 + (aprox).
This drain cover is approx 4 7/8″ in diameter and mounts with a screw in the center.

For your safety, be sure to visually confirm this is the correct suction cover for your spa, or call us for help.