A have a new 2-pack of Toread Replacement Cartridges with a model number TRF-6CH-940. They are still sealed in their original packaging. See manufacturer’s description and pictures for additional information.
From the manufacturer:
NSF/ANSI 50 CERTIFIED - TOREAD Pool and Spa filter is tested and certified by IAPMO against NSF/ANSI 50. The filter with certified safe materials provides you with clean, fresh and clear water. Only select certified filters for your family to ensure the safety, health and happiness of your loved ones.
REPLACEMENT MODELS - TRF-6CH-940 is Compatible with PWW50P3 (NOT PWW50P4), Unicel 6CH-940, Aladdin 14510, Baleen AK-9019, 78902, SD-00031, SD-00710, PLE-051-9193, PLE-051-9194. Length: 7 5/8"; Outside Diameter: 6"; Top: Circular Handle; Bottom: 1 1/2" SAE thread (Coarse Thread); Filtration Area: 45 sq. ft. NOTE: This is a compatible spare part and the manufacturers' names and part numbers have been used for reference purposes only. TOREAD is an independent brand.
REINFORCEMENT STRUCTURE - With 25% thicker filtration fabric, heavy chlorine resistant and break-resistant end caps and reinforced center support, the filter delivers high powered propulsion flow, and crystal clear water, providing you with a relaxed and healthy enjoyment.
MORE EFFICIENT FILTRATION AREA - Uniformity and high-performance trilobal fabric has 21-40% higher capacity compared with common point-bond fabric. The trilobal shape of fabric fibers also helps catch particles, increases efficiency without the pressure drop penalty, and helps reduce filter cleanining frequency.
