Hello,
The North Sail loft in Sweden makes them and I got one shipped to me in New Jersey, USA. It was well cut and has maintained its crispness for many years.
Tay

Gotord, The back of your boat looks very much like mine. Do you have any trouble with the outboard mounted on the back? I kept it in the lazarette well (not the best place) because I was afraid that it would conflict with the widnvane if it were on the back. And, yes, the Monitor steers the boat ...

Hello, I have IF-946 (1971) Spirit of Adventure with a 6 hp, 4 stroke in the well. I think the transom mount is preferable, but I have a wind vane self-steering on the transom and can't fit an outboard. The well works, but also has some problems. Email me if you are interested in more details. Tay ...

I installed a Monitor Windvane.
Pros: Works great (most important factor). Very well designed. Can use as emergency boarding ladder. Super solid. Great folks to buy from.
Cons: Expensive. Heavy. Complicated installation.
Tay Bosley IF 946 Spirit of Adventure