spoke protector for 40 hole rim and large hub flange?

Does anyone know if a plastic spoke protector is available for a 40 hole rim and large flange hub? I googled and could not come up with anything. If a 40 is not available do you know if a spoke protector made for a different hole count would work? Or possibly something homemade? Any ideas would be appreciated. I know a lot of folks do not use one but I like the idea of it just in case.

We have a Burley Duet from I think 2003. It is a nine speed. Not that this is relevant.

Thanks!