Hello. Sorry about delay in replying to your post, but I’ve had trouble finding it on the website, until now. I bought new wiper blades for my 2009 Nauticat 331 at Force 4, Hamble. I think you would get arms there too. I took one of the old blades in and they matched it to one of the types they had in stock. Very helpful staff. You just have to be careful to get the hinge fitting correct. Good luck. Andrew Bell
Thanks Piers for the advice. I got another tip and found suitable blades from P.A.Lynch and, with a little tweaking, they fit. For anyone interested, the website is <https://www.palynch.co.uk/default.asp?Menu=833>.