I doubt anybody in the US would stock them, as there would be very little demand for them.
You might try After Sales service at the factory, SVP Yachts in Slovenia. aftersales@svpyachts.com
Sometimes in the past, they have been known to ship parts directly to customers in Europe. I'm not sure about the US, but it would be worth a try in my opinion. Of course, you would have shipping costs, customs and tax to contend with...