I'd also say you should call Seals. They have been the best! They made a custom skirt for my friend's Borealis XL, adding an XXXL tunnel for him based on his measurements. Since we are only an hour from their shop, he took them the boat to measure. It was a new model, and they were pleased to get their hands on one to measure.
As an example of their level of service, I had them repair a neoprene skirt that I bought used a few years ago. I pulled the tunnel loose from the deck after using the skirt a lot. I fully expected to pay for the repair, but they sent it back nicely fixed, free of charge. They paid the return postage, and sent along a zip portfolio as a gift! You can't get better service than that.