Thanks for getting back to us. We were referring to a scupper plug, which helps keep water out of sit on top kayaks, and often comes with a rubber gasket that seals off the hole.
At this time, we are extremely limited in the stock we have on hand in several categories, including kayaks and SUPs. That's why we don't have it listed on our website currently.
We recommend reaching out directly to Perception to ask them about the plug and see if this is an issue that others have reported. You can reach them at 888-52-KAYAK (5-2925). They are available to call from 1-5pm Eastern Time.
Hopefully this helps!