It's Pall not Pell, sorry about that.Here's a cut and paste from another support site with contact info for Pall.

Here is some info for those of you who use the Pall filter for your shower: Cytiva (who bought Pall) no longer ships direct to consumer. They advised me to contact Filtration Services, a company they have partnered with, who sold me the filters.
The contact at Filtration Services, located in Wisconsin, is named Patty Schwartz. Her phone number: 920-845-5810 ext 117. Her email address is pschwartz@filtrationservices.net .