We sell an adjustable spray skirt that fits our Bluefin kayaks: https://pakayak.com/shop/nylon-adjustable-sprayskirt/
If you want something else, know that spray skirts have two dimensions you need to be aware of: one is deck size (cockpit) and the other is tunnel size (paddler's torso). It's important that the deck size match the boat and the tunnel size match the paddler. REI has a fit guide.
The Seals size is 2.2. We have also used a Snapdragon Ocean Trek XL spray skirt and a Harmony 38-20 with our Pakayaks and both match our deck size and work perfectly. By using those sizes you will be able to convert to almost any brand on the market.