Zinc prob, shiny prop, ice around the dock

Hello. I have a really good Volvo 3 blade folding propeller and reliable yanmar saildrive sd20. But the problem is the zinc between. The previous zinc is Perfect but it is starting to corrode away. I tried to google it but with no luck so far.

Maybe I’ll ask from Volvo.

Sea is still covered by ice, so we are not in a hurry with the boat yet.

Yanmar zinc problem

Volvo Penta and yanmar zinc do not fit properly

Previous zinc

If anybody knows where to find similar zinc than the left, please let me know.

Vinegar bath

Shiny prop

Merisatama still covered with ice…